#21C2DE
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(75% 0.126 213.5), rgb(33, 194, 222).
Aa
Black text reads best on this color (9.83:1).
About this color
#21C2DE is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 75%, its chroma 0.126 and its hue 214°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.038 away. Black text reads best on it, at 9.83:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (75%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 9.83:1 |
| White text | 2.13:1 |
Values
| HEX | #21C2DE |
| RGB | rgb(33, 194, 222) |
| HSL | hsl(189, 74%, 50%) |
| OKLCH | oklch(75% 0.126 213.5) |
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 #21C2DE | 2.13:1 | Fails | Lc -46.0 | Large or bold text, headings |
| Black text on #21C2DE | 9.83:1 | AAA | Lc 62.6 | Content text, not long reading |
| #21C2DE text on white | 2.13:1 | Fails | Lc 41.4 | Non-text elements, placeholder text |
| #21C2DE text on black | 9.83:1 | AAA | Lc -60.9 | 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
#EEF7FA
oklch(97% 0.01 219.6)
-
Step 100
100
#DAEEF3
oklch(93.6% 0.022 214.4)
-
Step 200
200
#B9E1EB
oklch(88.4% 0.044 214.6)
-
Step 300
300
#82CEDF
oklch(80.8% 0.079 213.5)
-
Step 400
400 (this color)
#21C2DE
oklch(75% 0.126 213.5)
-
Step 500
500
#009AB2
oklch(63.1% 0.111 213.9)
-
Step 600
600
#008296
oklch(55.7% 0.098 213.4)
-
Step 700
700
#006D7E
oklch(49.1% 0.086 213.3)
-
Step 800
800
#005968
oklch(42.7% 0.075 214.2)
-
Step 900
900
#004A57
oklch(37.6% 0.066 214.5)
-
Step 950
950
#002C34
oklch(26.9% 0.047 213.2)
#21C2DE 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) | #ADBBE0 | 0.114 |
| Deuteranopia (no green cones) | #96AADE | 0.104 |
| Tritanopia (no blue cones) | #00CDCB | 0.048 |
| Achromatopsia (no color) | #B1B1B1 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21C2DE
#21C2DE
oklch(75% 0.126 213.5)
- #F38F78
#F38F78
oklch(75.1% 0.127 33.8)
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 #21C2DE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.038
- Dark Turquoise #00CED1 ΔE 0.044
- Bright Sky Blue #02CCFE ΔE 0.048
- Deep Sky Blue #00BFFF ΔE 0.052
- Turquoise Blue #06B1C4 ΔE 0.056
- Aqua Blue #02D8E9 ΔE 0.059
- Medium Turquoise #48D1CC ΔE 0.060
- Topaz #13BBAF ΔE 0.068
Use #21C2DE 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.