#00D4EF
Closest named color: Aqua Blue (#02D8E9). oklch(79.8% 0.138 210.9), rgb(0, 212, 239).
Aa
Black text reads best on this color (11.66:1).
About this color
#00D4EF is a light, moderately saturated teal or cyan. In OKLCH its lightness is 80%, its chroma 0.138 and its hue 211°. Its hue sits on the cool side of the wheel. The nearest named color is Aqua Blue (#02D8E9), ΔE 0.016 away. Black text reads best on it, at 11.66:1.
| Hue family | Teals and cyans |
| Lightness | light (80%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | Aqua Blue (#02D8E9) |
| Black text | 11.66:1 |
| White text | 1.80:1 |
Values
| HEX | #00D4EF |
| RGB | rgb(0, 212, 239) |
| HSL | hsl(187, 100%, 47%) |
| OKLCH | oklch(79.8% 0.138 210.9) |
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 #00D4EF | 1.80:1 | Fails | Lc -36.7 | Non-text elements, placeholder text |
| Black text on #00D4EF | 11.66:1 | AAA | Lc 71.2 | Content text, not long reading |
| #00D4EF text on white | 1.80:1 | Fails | Lc 32.7 | Non-text elements, placeholder text |
| #00D4EF text on black | 11.66:1 | AAA | Lc -70.0 | 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
#E8F9FD
oklch(97.1% 0.019 213.4)
-
Step 100
100
#CCF2F9
oklch(93.6% 0.04 210)
-
Step 200
200
#9CE7F6
oklch(88.4% 0.077 211.5)
-
Step 300
300 (this color)
#00D4EF
oklch(79.8% 0.138 210.9)
-
Step 400
400
#00B4CC
oklch(70.6% 0.123 211.4)
-
Step 500
500
#009BAF
oklch(63.2% 0.11 210.8)
-
Step 600
600
#008293
oklch(55.6% 0.096 210.7)
-
Step 700
700
#006D7C
oklch(49% 0.085 211.2)
-
Step 800
800
#005966
oklch(42.6% 0.074 211.8)
-
Step 900
900
#004B55
oklch(37.8% 0.065 210)
-
Step 950
950
#002C33
oklch(26.9% 0.047 211.1)
#00D4EF 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) | #BECCF1 | 0.129 |
| Deuteranopia (no green cones) | #A4B9EF | 0.117 |
| Tritanopia (no blue cones) | #00DFDC | 0.047 |
| Achromatopsia (no color) | #C1C1C1 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00D4EF
#00D4EF
oklch(79.8% 0.138 210.9)
- #FFA08F
#FFA08F
oklch(79.8% 0.117 30.8)
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 #00D4EF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Blue #02D8E9 ΔE 0.016
- Vivid Sky Blue #4CC9F0 ΔE 0.035
- Bright Sky Blue #02CCFE ΔE 0.036
- Dark Turquoise #00CED1 ΔE 0.043
- Medium Turquoise #48D1CC ΔE 0.049
- Lightblue #7BC8F6 ΔE 0.064
- Sky Blue #87CEEB ΔE 0.065
- Turquoise #40E0D0 ΔE 0.065
Use #00D4EF 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.