#21F6EA
Closest named color: Bright Aqua (#0BF9EA). oklch(87.9% 0.149 188.4), rgb(33, 246, 234).
Aa
Black text reads best on this color (15.43:1).
About this color
#21F6EA is a light, vivid teal or cyan. In OKLCH its lightness is 88%, its chroma 0.149 and its hue 188°. Its hue sits on the cool side of the wheel. The nearest named color is Bright Aqua (#0BF9EA), ΔE 0.008 away. Black text reads best on it, at 15.43:1.
| Hue family | Teals and cyans |
| Lightness | light (88%) |
| Chroma | vivid (0.149) |
| Temperature | cool |
| Nearest name | Bright Aqua (#0BF9EA) |
| Black text | 15.43:1 |
| White text | 1.36:1 |
Values
| HEX | #21F6EA |
| RGB | rgb(33, 246, 234) |
| HSL | hsl(177, 92%, 55%) |
| OKLCH | oklch(87.9% 0.149 188.4) |
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 #21F6EA | 1.36:1 | Fails | Lc -19.5 | Dividers and decoration only |
| Black text on #21F6EA | 15.43:1 | AAA | Lc 86.6 | Fine for body text |
| #21F6EA text on white | 1.36:1 | Fails | Lc 17.0 | Dividers and decoration only |
| #21F6EA text on black | 15.43:1 | AAA | Lc -86.6 | Fine for body text |
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 200.
-
Step 50
50
#E3FBF9
oklch(97% 0.025 190.7)
-
Step 100
100
#C0F6F1
oklch(93.5% 0.055 189.2)
-
Step 200
200 (this color)
#21F6EA
oklch(87.9% 0.149 188.4)
-
Step 300
300
#00DDD2
oklch(80.9% 0.14 188.4)
-
Step 400
400
#00B9AF
oklch(70.8% 0.123 188)
-
Step 500
500
#009E96
oklch(63% 0.109 188.5)
-
Step 600
600
#00857E
oklch(55.6% 0.097 188.3)
-
Step 700
700
#00706A
oklch(49.1% 0.085 188.3)
-
Step 800
800
#005C57
oklch(42.8% 0.074 188.4)
-
Step 900
900
#004C48
oklch(37.6% 0.065 188.7)
-
Step 950
950
#002E2B
oklch(27.1% 0.047 188)
#21F6EA 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) | #E8E8EA | 0.158 |
| Deuteranopia (no green cones) | #CDD5EC | 0.148 |
| Tritanopia (no blue cones) | #00FDF2 | 0.019 |
| Achromatopsia (no color) | #DDDDDD | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21F6EA
#21F6EA
oklch(87.9% 0.149 188.4)
- #FFC6CE
#FFC6CE
oklch(87.9% 0.066 9.1)
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 #21F6EA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bright Aqua #0BF9EA ΔE 0.008
- Bright Turquoise #0FFEF9 ΔE 0.025
- Bright Light Blue #26F7FD ΔE 0.027
- Cyan #00FFFF ΔE 0.032
- Bright Cyan #41FDFE ΔE 0.033
- Light Turquoise #7EF4CC ΔE 0.053
- Robin's Egg #6DEDFD ΔE 0.053
- Bright Teal #01F9C6 ΔE 0.054
Use #21F6EA 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.