Tailwind CSS v3 color
Tailwind sky-700 #0369A1
Tailwind CSS v3's sky-700 is #0369A1. It is a soft blue in the blue family. In OKLCH it sits at lightness 0.500, chroma 0.119 and hue 242.7°. The nearest CSS named color is steelblue (#4682B4), ΔE2000 10.1 away.
- Relative luminance
- 0.1270
- OKLCH L · C · h
- 0.500 · 0.119 · 242.7
- Best text
- White 5.93:1
- Hue family
- Blue
#0369A1 color codes
- HEX
#0369A1- RGB
rgb(3, 105, 161)- HSL
hsl(201, 96%, 32%)- OKLCH
oklch(0.500 0.119 242.7)- OKLab
oklab(0.500 -0.055 -0.106)- CIELAB (D65)
L* 42.30, a* -3.85, b* -37.21- XYZ (D65)
X 11.52, Y 12.69, Z 35.55- CMYK (naive)
cmyk(98%, 35%, 0%, 37%)
CIELAB and XYZ use the D65 white point; CSS lab() uses D50, so paste the OKLCH or HEX value into stylesheets. CMYK here is a plain formula with no press profile.
Legibility
Contrast: is #0369A1 accessible?
White text on it reaches 5.93:1, passing AA. Black text manages only 3.53:1, enough for large text only.
WCAG 2 gives the same ratio whichever color is the text; APCA does not, so its Lc changes sign and size with polarity.
Open the Contrast System-
Black text on it
3.53:1
- AA fails
- AA large passes
- AAA fails
- APCA Lc +24
-
White text on it
5.93:1
- AA passes
- AA large passes
- AAA fails
- APCA Lc −84
-
As text on black
3.53:1
- AA fails
- AA large passes
- AAA fails
- APCA Lc −22
-
As text on white
5.93:1
- AA passes
- AA large passes
- AAA fails
- APCA Lc +79
Nearest versions that pass 4.5:1
-
For text on white
#0369A1 5.93:1
It already reaches 5.93:1 on white, so no change is needed.
-
For text on black
#247BB4 4.56:1
Lightening its OKLCH lightness from 0.50 to 0.56 reaches 4.56:1 on black, keeping the hue.
Checking another pair? Use the Contrast Checker.
Studio
Adjust #0369A1 live
Move lightness, chroma and hue in OKLCH, or drag on the map. The map is every lightness and chroma at the current hue: sRGB inside the solid area, Display P3 out to the dashed line.
Scale
Shades and tints of #0369A1
Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #0369A1 sits at step 700.
Under each step, white and black text on it; a bold figure passes 4.5:1.
Tailwind CSS v3 sky scale
The real Tailwind palette, for comparison with the computed ramp above.
Gamut
How vivid #0369A1 can get
At its lightness and hue, sRGB reaches OKLCH chroma 0.120; #0369A1 uses 99% of it. Display P3, which many recent phones and laptops show, reaches 0.157 there: 30% more.
- sRGB
- Display P3
- Rec. 2020
- Dominant wavelength
- OKLCH chroma
- 0.119
- sRGB edge
- 0.120
- Display P3 edge
- 0.157
- Rec. 2020 edge
- 0.328
- Dominant wavelength
- 479 nm
- Excitation purity
- 56%
- Chromaticity
- x 0.1927, y 0.2124
- This color#0369A1
- Most vivid in sRGB#0069A2
- Most vivid in Display P3oklch(0.500 0.157 242.7)
On a screen without Display P3 the last tile shows the sRGB edge instead.
.accent {
color: #0369a1;
}
@media (color-gamut: p3) {
.accent { color: color(display-p3 0 0.4021 0.683); }
}Mixing
Mixing #0369A1
Each row is the same mix worked out in a different space, with the halfway color at its end. sRGB, which older CSS gradients use, can sag gray or dark in the middle; OKLab keeps the lightness steps even; OKLCH holds chroma and hue as it goes.
White #FFFFFF
- sRGB50%#81B4D0
- OKLab50%#8DB3D1
- OKLCH50%#8DB3D1
Black #000000
- sRGB50%#023551
- OKLab50%#00243C
- OKLCH50%#00243C
Its complement #905200
- sRGB50%#4A5E51
- OKLab50%#626364
- OKLCH50%#1C7641
/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #0369a1, white);
color: color-mix(in oklch, #0369a1 50%, white);In use
#0369A1 in an interface
A button, a link, a heading, a focused field, an icon and a chart line in this color, on a light page and a dark one. Each check is a WCAG 2 contrast minimum: 1.4.3 for text, 1.4.11 for the rest.
Light page
- Button labelText, 4.5:15.93:1 Passes
- Link and body-size textText, 4.5:15.93:1 Passes
- Large headingLarge text, 3:15.93:1 Passes
- Icons, borders and focus ringsNon-text, 3:15.93:1 Passes
Dark page
- Button labelText, 4.5:15.93:1 Passes
- Link and body-size textText, 4.5:13.15:1 Fails
- Large headingLarge text, 3:13.15:1 Passes
- Icons, borders and focus ringsNon-text, 3:13.15:1 Passes
For text on this page, the nearest shade that passes is #2D83BC 4.53:1
Color vision
How #0369A1 looks with color blindness
Achromatopsia changes it most, ΔE2000 20.4; deuteranopia changes it least, 8.3.
Simulated with Machado et al. (2009) at full severity, in linear light.
Simulate a whole page What each type sees-
Protanopia
No working red (long-wavelength) cones
#4E6BA3 ΔE2000 9.0
Noticeable
Reads as muted blue
-
Deuteranopia
No working green (medium-wavelength) cones
#395EA0 ΔE2000 8.3
Noticeable
Reads as soft blue
-
Tritanopia
No working blue (short-wavelength) cones
#00777D ΔE2000 18.9
Distinct
Reads as muted teal
-
Achromatopsia
No cone color vision; lightness only
#646464 ΔE2000 20.4
Distinct
Reads as gray
Pairing check
Checked against its complement, #905200. Their lightness contrast is only 1.04:1, so where hue collapses, add a label, icon or pattern.
| Vision | The pair | ΔE2000 | Verdict |
|---|---|---|---|
| Normal vision | #0369A1 · #905200 | 45.1 | Stays distinct |
| Protanopia | #4E6BA3 · #655800 | 46.5 | Stays distinct |
| Deuteranopia | #395EA0 · #746701 | 50.4 | Stays distinct |
| Tritanopia | #00777D · #9E4345 | 46.4 | Stays distinct |
| Achromatopsia | #646464 · #616161 | 1.1 | Easily confused |
Harmony
Color harmonies for #0369A1
Its complement is #905200, a soft brown, on the warm side of the wheel.
Hue rotations in OKLCH, mapped into sRGB by trimming chroma so hue and lightness stay put.
Open the Harmony Studio- Base#0369A1
- Complement#905200
Complementary
Open in Harmony Studio- −30°#007081
- Base#0369A1
- +30°#4D5CA7
Analogous
Open in Harmony Studio- Base#0369A1
- +120°#98425D
- +240°#576D07
Triadic
Open in Harmony Studio- Base#0369A1
- +150°#9B4534
- +210°#786100
Split-complementary
Open in Harmony StudioCode
Design tokens
Ready-to-paste tokens in six formats. Rename them to fit your system.
:root {
--color-sky-700: #0369a1;
}// tailwind.config.js — already built in as sky-700;
// pin the v3 value explicitly like this:
module.exports = {
theme: {
extend: {
colors: {
sky: { 700: '#0369a1' },
},
},
},
};/* app.css — Tailwind CSS v4 */
@import "tailwindcss";
@theme {
/* v4 has its own sky-700; this pins the v3 value. */
--color-sky-700: oklch(0.500 0.119 242.7);
}{
"color": {
"sky-700": {
"$type": "color",
"$value": {
"colorSpace": "srgb",
"components": [0.0118, 0.4118, 0.6314],
"hex": "#0369a1"
},
"$description": "Tailwind CSS v3 sky-700"
}
}
}import SwiftUI
enum Palette {
static let sky700 = Color(.sRGB, red: 0.012, green: 0.412, blue: 0.631, opacity: 1)
}import androidx.compose.ui.graphics.Color
object Palette {
val Sky700 = Color(0xFF0369A1)
}Matches
The nearest match in each system
The closest CSS name, Tailwind shade, RAL Classic paint and Crayola crayon by ΔE2000; under 2 is hard to tell apart side by side. RAL and Crayola values approximate physical colors.
Tools
Open #0369A1 in the tools
Each opens over this page. More colors live in the Color Library, and every color page is listed on the hub.
- Color InspectorEvery format, its names, contrast and color vision in one panel.
- Contrast SystemBlack and white text on this color, with fixes in both directions.
- Harmony StudioPalettes built from this color, walked to a contrast target if you ask.
- Color Space ConverterThe same color in 34 notations, with its gamut headroom.
- Color Name FinderThe nearest of 1,055 color names by ΔE2000.