CSS named color
Deep Sky Blue #00BFFF
The CSS keyword deepskyblue is #00BFFF. It is a light soft blue in the blue family. In OKLCH it sits at lightness 0.755, chroma 0.153 and hue 231.6°.
- Relative luminance
- 0.4448
- OKLCH L · C · h
- 0.755 · 0.153 · 231.6
- Best text
- Black 9.89:1
- Hue family
- Blue
#00BFFF color codes
- HEX
#00BFFF- RGB
rgb(0, 191, 255)- HSL
hsl(195, 100%, 50%)- OKLCH
oklch(0.755 0.153 231.6)- OKLab
oklab(0.755 -0.095 -0.120)- CIELAB (D65)
L* 72.55, a* -17.66, b* -42.54- XYZ (D65)
X 36.67, Y 44.48, Z 101.24- CMYK (naive)
cmyk(100%, 25%, 0%, 0%)
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 #00BFFF accessible?
Black text on it reaches 9.89:1, passing AAA. White text fails at 2.12:1.
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
9.89:1
- AA passes
- AA large passes
- AAA passes
- APCA Lc +63
-
White text on it
2.12:1
- AA fails
- AA large fails
- AAA fails
- APCA Lc −45
-
As text on black
9.89:1
- AA passes
- AA large passes
- AAA passes
- APCA Lc −61
-
As text on white
2.12:1
- AA fails
- AA large fails
- AAA fails
- APCA Lc +40
Nearest versions that pass 4.5:1
-
For text on white
#007FAB 4.54:1
Darkening its OKLCH lightness from 0.76 to 0.56 reaches 4.54:1 on white, keeping the hue.
-
For text on black
#00BFFF 9.89:1
It already reaches 9.89:1 on black, so no change is needed.
Checking another pair? Use the Contrast Checker.
Studio
Adjust #00BFFF 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 #00BFFF
Eleven OKLCH lightness steps at this hue, each with its contrast against white and black. #00BFFF sits at step 300.
Under each step, white and black text on it; a bold figure passes 4.5:1.
Gamut
How vivid #00BFFF can get
At its lightness and hue, sRGB reaches OKLCH chroma 0.153; #00BFFF uses 100% of it. Display P3, which many recent phones and laptops show, reaches 0.166 there: 8% more.
- sRGB
- Display P3
- Rec. 2020
- Dominant wavelength
- OKLCH chroma
- 0.153
- sRGB edge
- 0.153
- Display P3 edge
- 0.166
- Rec. 2020 edge
- 0.168
- Dominant wavelength
- 482 nm
- Excitation purity
- 49%
- Chromaticity
- x 0.2011, y 0.2439
- This color#00BFFF
- Most vivid in sRGB#00BFFF
- Most vivid in Display P3oklch(0.755 0.166 231.6)
On a screen without Display P3 the last tile shows the sRGB edge instead.
.accent {
color: #00bfff;
}
@media (color-gamut: p3) {
.accent { color: color(display-p3 0.2886 0.7399 1); }
}Mixing
Mixing #00BFFF
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%#80DFFF
- OKLab50%#A3E1FF
- OKLCH50%#A6E0FF
Black #000000
- sRGB50%#006080
- OKLab50%#004863
- OKLCH50%#004863
Its complement #FA904A
- sRGB50%#7DA8A5
- OKLab50%#AFAFAF
- OKLCH50%#73C769
/* A gradient and a mix, worked out in OKLCH */
background: linear-gradient(in oklch, #00bfff, white);
color: color-mix(in oklch, #00bfff 50%, white);In use
#00BFFF 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, 4.5:19.89:1 Passes
- Link and body-size textText, 4.5:12.12:1 Fails
- Large headingLarge text, 3:12.12:1 Fails
- Icons, borders and focus ringsNon-text, 3:12.12:1 Fails
For text on this page, the nearest shade that passes is #007FAB 4.54:1
Dark page
- Button labelText, 4.5:19.89:1 Passes
- Link and body-size textText, 4.5:18.82:1 Passes
- Large headingLarge text, 3:18.82:1 Passes
- Icons, borders and focus ringsNon-text, 3:18.82:1 Passes
Color vision
How #00BFFF looks with color blindness
Achromatopsia changes it most, ΔE2000 23.0; deuteranopia changes it least, 16.4.
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
#9EBDFF ΔE2000 16.8
Distinct
Reads as light soft blue
-
Deuteranopia
No working green (medium-wavelength) cones
#81A9FE ΔE2000 16.4
Distinct
Reads as light soft blue
-
Tritanopia
No working blue (short-wavelength) cones
#00D0D5 ΔE2000 18.1
Distinct
Reads as light soft cyan
-
Achromatopsia
No cone color vision; lightness only
#B2B2B2 ΔE2000 23.0
Distinct
Reads as light gray
Pairing check
Checked against its complement, #FA904A. Their lightness contrast is only 1.08:1, so where hue collapses, add a label, icon or pattern.
| Vision | The pair | ΔE2000 | Verdict |
|---|---|---|---|
| Normal vision | #00BFFF · #FA904A | 52.1 | Stays distinct |
| Protanopia | #9EBDFF · #AE9D42 | 48.9 | Stays distinct |
| Deuteranopia | #81A9FE · #C8B449 | 54.0 | Stays distinct |
| Tritanopia | #00D0D5 · #FF7A81 | 58.7 | Stays distinct |
| Achromatopsia | #B2B2B2 · #ABABAB | 2.0 | Easily confused |
Harmony
Color harmonies for #00BFFF
Its complement is #FA904A, a light soft orange, 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#00BFFF
- Complement#FA904A
Complementary
Open in Harmony Studio- −30°#00C7D2
- Base#00BFFF
- +30°#83AFFF
Analogous
Open in Harmony Studio- Base#00BFFF
- +120°#F783BA
- +240°#B3B82C
Triadic
Open in Harmony Studio- Base#00BFFF
- +150°#FF8786
- +210°#E0A40F
Split-complementary
Open in Harmony StudioCode
Design tokens
Ready-to-paste tokens in six formats. Rename them to fit your system.
:root {
--color-deepskyblue: #00bfff;
}// tailwind.config.js
module.exports = {
theme: {
extend: {
colors: {
deepskyblue: '#00bfff',
},
},
},
};/* app.css — Tailwind CSS v4 */
@import "tailwindcss";
@theme {
--color-deepskyblue: oklch(0.755 0.153 231.6);
}{
"color": {
"deepskyblue": {
"$type": "color",
"$value": {
"colorSpace": "srgb",
"components": [0, 0.749, 1],
"hex": "#00bfff"
},
"$description": "CSS named color deepskyblue"
}
}
}import SwiftUI
enum Palette {
static let deepskyblue = Color(.sRGB, red: 0.000, green: 0.749, blue: 1.000, opacity: 1)
}import androidx.compose.ui.graphics.Color
object Palette {
val Deepskyblue = Color(0xFF00BFFF)
}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 #00BFFF 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.