#00C3DA
Closest named color: Dark Turquoise (#00CED1). oklch(74.9% 0.129 209.7), rgb(0, 195, 218).
Aa
Black text reads best on this color (9.81:1).
About this color
#00C3DA is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 75%, its chroma 0.129 and its hue 210°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Turquoise (#00CED1), ΔE 0.038 away. Black text reads best on it, at 9.81:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (75%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Dark Turquoise (#00CED1) |
| Black text | 9.81:1 |
| White text | 2.13:1 |
Values
| HEX | #00C3DA |
| RGB | rgb(0, 195, 218) |
| HSL | hsl(186, 100%, 43%) |
| OKLCH | oklch(74.9% 0.129 209.7) |
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 #00C3DA | 2.13:1 | Fails | Lc -45.9 | Large or bold text, headings |
| Black text on #00C3DA | 9.81:1 | AAA | Lc 62.7 | Content text, not long reading |
| #00C3DA text on white | 2.13:1 | Fails | Lc 41.3 | Non-text elements, placeholder text |
| #00C3DA text on black | 9.81:1 | AAA | Lc -61.0 | 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 400.
-
Step 50
50
#EEF8F9
oklch(97.2% 0.011 204.1)
-
Step 100
100
#D9EFF2
oklch(93.7% 0.024 206.6)
-
Step 200
200
#B8E2E9
oklch(88.5% 0.045 208.8)
-
Step 300
300
#7FCFDD
oklch(80.8% 0.081 209.8)
-
Step 400
400 (this color)
#00C3DA
oklch(74.9% 0.129 209.7)
-
Step 500
500
#009BAD
oklch(63.1% 0.109 209.2)
-
Step 600
600
#008292
oklch(55.6% 0.096 209.8)
-
Step 700
700
#006D7B
oklch(49% 0.085 210.2)
-
Step 800
800
#005A65
oklch(42.8% 0.074 209.1)
-
Step 900
900
#004B54
oklch(37.8% 0.065 208.5)
-
Step 950
950
#002C33
oklch(26.9% 0.047 211.1)
#00C3DA 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) | #AFBBDB | 0.121 |
| Deuteranopia (no green cones) | #97AADA | 0.110 |
| Tritanopia (no blue cones) | #00CDCA | 0.042 |
| Achromatopsia (no color) | #B1B1B1 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00C3DA
#00C3DA
oklch(74.9% 0.129 209.7)
- #F48C7C
#F48C7C
oklch(74.8% 0.129 29.7)
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 #00C3DA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Turquoise #00CED1 ΔE 0.038
- Vivid Sky Blue #4CC9F0 ΔE 0.045
- Bright Sky Blue #02CCFE ΔE 0.053
- Turquoise Blue #06B1C4 ΔE 0.054
- Medium Turquoise #48D1CC ΔE 0.056
- Aqua Blue #02D8E9 ΔE 0.058
- Deep Sky Blue #00BFFF ΔE 0.059
- Topaz #13BBAF ΔE 0.061
Use #00C3DA 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.