#21E2E6
Closest named color: Turquoise (#40E0D0). oklch(83% 0.137 197.2), rgb(33, 226, 230).
Aa
Black text reads best on this color (13.08:1).
About this color
#21E2E6 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 83%, its chroma 0.137 and its hue 197°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise (#40E0D0), ΔE 0.030 away. Black text reads best on it, at 13.08:1.
| Hue family | Teals and cyans |
| Lightness | light (83%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Turquoise (#40E0D0) |
| Black text | 13.08:1 |
| White text | 1.60:1 |
Values
| HEX | #21E2E6 |
| RGB | rgb(33, 226, 230) |
| HSL | hsl(181, 80%, 52%) |
| OKLCH | oklch(83% 0.137 197.2) |
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 #21E2E6 | 1.60:1 | Fails | Lc -30.1 | Non-text elements, placeholder text |
| Black text on #21E2E6 | 13.08:1 | AAA | Lc 77.1 | Fine for body text |
| #21E2E6 text on white | 1.60:1 | Fails | Lc 26.7 | Dividers and decoration only |
| #21E2E6 text on black | 13.08:1 | AAA | Lc -76.4 | 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 300.
-
Step 50
50
#E8FAFA
oklch(97.2% 0.019 196.8)
-
Step 100
100
#CCF3F3
oklch(93.7% 0.04 196.5)
-
Step 200
200
#9CE9EB
oklch(88.5% 0.076 197.9)
-
Step 300
300 (this color)
#21E2E6
oklch(83% 0.137 197.2)
-
Step 400
400
#00B7BA
oklch(70.7% 0.12 196.9)
-
Step 500
500
#009DA0
oklch(63.1% 0.107 197.2)
-
Step 600
600
#008486
oklch(55.6% 0.095 196.7)
-
Step 700
700
#006F71
oklch(49.1% 0.084 197)
-
Step 800
800
#005B5D
oklch(42.7% 0.073 197.4)
-
Step 900
900
#004C4D
oklch(37.8% 0.064 196.3)
-
Step 950
950
#002D2E
oklch(27% 0.046 197.1)
#21E2E6 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) | #D1D7E7 | 0.141 |
| Deuteranopia (no green cones) | #B8C4E7 | 0.132 |
| Tritanopia (no blue cones) | #00EAE3 | 0.024 |
| Achromatopsia (no color) | #CCCCCC | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21E2E6
#21E2E6
oklch(83% 0.137 197.2)
- #FFAEB1
#FFAEB1
oklch(82.9% 0.095 16.9)
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 #21E2E6, closest first.
No curated palette has a color within ΔE 0.04 of #21E2E6.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise #40E0D0 ΔE 0.030
- Aqua Blue #02D8E9 ΔE 0.031
- Medium Turquoise #48D1CC ΔE 0.049
- Dark Turquoise #00CED1 ΔE 0.058
- Robin's Egg #6DEDFD ΔE 0.058
- Bright Light Blue #26F7FD ΔE 0.059
- Bright Aqua #0BF9EA ΔE 0.063
- Aqua Marine #2EE8BB ΔE 0.068
Use #21E2E6 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.