#21E7C5
Closest named color: Aqua Marine (#2EE8BB). oklch(83.1% 0.15 176.5), rgb(33, 231, 197).
Aa
Black text reads best on this color (13.30:1).
About this color
#21E7C5 is a light, vivid teal or cyan. In OKLCH its lightness is 83%, its chroma 0.150 and its hue 177°. Its hue sits on the cool side of the wheel. The nearest named color is Aqua Marine (#2EE8BB), ΔE 0.015 away. Black text reads best on it, at 13.30:1.
| Hue family | Teals and cyans |
| Lightness | light (83%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Aqua Marine (#2EE8BB) |
| Black text | 13.30:1 |
| White text | 1.57:1 |
Values
| HEX | #21E7C5 |
| RGB | rgb(33, 231, 197) |
| HSL | hsl(170, 80%, 52%) |
| OKLCH | oklch(83.1% 0.15 176.5) |
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 #21E7C5 | 1.57:1 | Fails | Lc -29.1 | Dividers and decoration only |
| Black text on #21E7C5 | 13.30:1 | AAA | Lc 78.0 | Fine for body text |
| #21E7C5 text on white | 1.57:1 | Fails | Lc 25.7 | Dividers and decoration only |
| #21E7C5 text on black | 13.30:1 | AAA | Lc -77.3 | 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
#E8FAF5
oklch(97% 0.02 177.5)
-
Step 100
100
#CCF4E9
oklch(93.6% 0.044 176.8)
-
Step 200
200
#9CECD7
oklch(88.5% 0.084 175.9)
-
Step 300
300 (this color)
#21E7C5
oklch(83.1% 0.15 176.5)
-
Step 400
400
#00BB9E
oklch(70.8% 0.132 176.2)
-
Step 500
500
#00A087
oklch(63.1% 0.118 176.3)
-
Step 600
600
#008772
oklch(55.7% 0.104 176.6)
-
Step 700
700
#00715F
oklch(49% 0.091 176.5)
-
Step 800
800
#005D4E
oklch(42.8% 0.079 176.7)
-
Step 900
900
#004D40
oklch(37.6% 0.07 176.4)
-
Step 950
950
#002E26
oklch(26.9% 0.05 177.5)
#21E7C5 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) | #DED8C4 | 0.158 |
| Deuteranopia (no green cones) | #C6C7C8 | 0.150 |
| Tritanopia (no blue cones) | #00EADD | 0.032 |
| Achromatopsia (no color) | #CECECE | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21E7C5
#21E7C5
oklch(83.1% 0.15 176.5)
- #FFABC9
#FFABC9
oklch(83.1% 0.105 356.6)
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 #21E7C5, closest first.
No curated palette has a color within ΔE 0.04 of #21E7C5.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Marine #2EE8BB ΔE 0.015
- Turquoise #40E0D0 ΔE 0.030
- Bright Teal #01F9C6 ΔE 0.050
- Bright Aqua #0BF9EA ΔE 0.060
- Emerald #06D6A0 ΔE 0.061
- Light Teal #90E4C1 ΔE 0.063
- Light Turquoise #7EF4CC ΔE 0.065
- Aqua Green #12E193 ΔE 0.066
Use #21E7C5 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.