#00D9FF
Closest named color: Aqua Blue (#02D8E9). oklch(81.6% 0.145 216.5), rgb(0, 217, 255).
Aa
Black text reads best on this color (12.36:1).
About this color
#00D9FF is a light, vivid teal or cyan. In OKLCH its lightness is 82%, its chroma 0.145 and its hue 217°. Its hue sits on the cool side of the wheel. The nearest named color is Aqua Blue (#02D8E9), ΔE 0.032 away. Black text reads best on it, at 12.36:1.
| Hue family | Teals and cyans |
| Lightness | light (82%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Aqua Blue (#02D8E9) |
| Black text | 12.36:1 |
| White text | 1.69:1 |
Values
| HEX | #00D9FF |
| RGB | rgb(0, 217, 255) |
| HSL | hsl(189, 100%, 50%) |
| OKLCH | oklch(81.6% 0.145 216.5) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #00D9FF | 1.69:1 | Fails | Lc -33.3 | Non-text elements, placeholder text |
| Black text on #00D9FF | 12.36:1 | AAA | Lc 74.2 | Content text, not long reading |
| #00D9FF text on white | 1.69:1 | Fails | Lc 29.6 | Dividers and decoration only |
| #00D9FF text on black | 12.36:1 | AAA | Lc -73.3 | Content text, not long reading |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 300.
-
Step 50
50
#E8F9FE
oklch(97.1% 0.019 217.2)
-
Step 100
100
#CBF2FC
oklch(93.7% 0.043 215)
-
Step 200
200
#9AE7FC
oklch(88.5% 0.081 216.8)
-
Step 300
300 (this color)
#00D9FF
oklch(81.6% 0.145 216.5)
-
Step 400
400
#00B3D3
oklch(70.7% 0.126 216.7)
-
Step 500
500
#009AB5
oklch(63.2% 0.112 216)
-
Step 600
600
#008199
oklch(55.6% 0.099 216.9)
-
Step 700
700
#006C81
oklch(49% 0.088 217.4)
-
Step 800
800
#00596A
oklch(42.8% 0.076 216.6)
-
Step 900
900
#004A58
oklch(37.7% 0.067 215.8)
-
Step 950
950
#002C35
oklch(27% 0.048 215.4)
#00D9FF with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #C0D2FF | 0.126 |
| Deuteranopia (no green cones) | #A4BEFF | 0.113 |
| Tritanopia (no blue cones) | #00E6E5 | 0.060 |
| Achromatopsia (no color) | #C7C7C7 | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00D9FF
#00D9FF
oklch(81.6% 0.145 216.5)
- #FFAA92
#FFAA92
oklch(81.5% 0.106 36.5)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #00D9FF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Blue #02D8E9 ΔE 0.032
- Bright Sky Blue #02CCFE ΔE 0.036
- Vivid Sky Blue #4CC9F0 ΔE 0.043
- Lightblue #7BC8F6 ΔE 0.063
- Light Sky Blue #87CEFA ΔE 0.066
- Sky Blue #87CEEB ΔE 0.066
- Dark Turquoise #00CED1 ΔE 0.066
- Sky #82CAFC ΔE 0.066
Use #00D9FF in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.