#21DEBC
Closest named color: Aqua Marine (#2EE8BB). oklch(80.7% 0.146 175.8), rgb(33, 222, 188).
Aa
Black text reads best on this color (12.23:1).
About this color
#21DEBC is a light, vivid teal or cyan. In OKLCH its lightness is 81%, its chroma 0.146 and its hue 176°. Its hue sits on the cool side of the wheel. The nearest named color is Aqua Marine (#2EE8BB), ΔE 0.030 away. Black text reads best on it, at 12.23:1.
| Hue family | Teals and cyans |
| Lightness | light (81%) |
| Chroma | vivid (0.146) |
| Temperature | cool |
| Nearest name | Aqua Marine (#2EE8BB) |
| Black text | 12.23:1 |
| White text | 1.71:1 |
Values
| HEX | #21DEBC |
| RGB | rgb(33, 222, 188) |
| HSL | hsl(169, 74%, 50%) |
| OKLCH | oklch(80.7% 0.146 175.8) |
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 #21DEBC | 1.71:1 | Fails | Lc -34.1 | Non-text elements, placeholder text |
| Black text on #21DEBC | 12.23:1 | AAA | Lc 73.5 | Content text, not long reading |
| #21DEBC text on white | 1.71:1 | Fails | Lc 30.3 | Non-text elements, placeholder text |
| #21DEBC text on black | 12.23:1 | AAA | Lc -72.5 | 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 300.
-
Step 50
50
#E9FAF5
oklch(97.1% 0.019 176.5)
-
Step 100
100
#CDF4E9
oklch(93.6% 0.043 176.4)
-
Step 200
200
#9EEBD7
oklch(88.4% 0.081 176.2)
-
Step 300
300 (this color)
#21DEBC
oklch(80.7% 0.146 175.8)
-
Step 400
400
#00BB9D
oklch(70.7% 0.133 175.7)
-
Step 500
500
#00A086
oklch(63% 0.118 175.6)
-
Step 600
600
#008771
oklch(55.7% 0.104 175.8)
-
Step 700
700
#00715F
oklch(49% 0.091 176.5)
-
Step 800
800
#005D4D
oklch(42.7% 0.08 175.6)
-
Step 900
900
#004D40
oklch(37.6% 0.07 176.4)
-
Step 950
950
#002E25
oklch(26.9% 0.05 175.6)
#21DEBC 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) | #D5CFBA | 0.153 |
| Deuteranopia (no green cones) | #BFBFBF | 0.146 |
| Tritanopia (no blue cones) | #00E1D4 | 0.032 |
| Achromatopsia (no color) | #C6C6C6 | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21DEBC
#21DEBC
oklch(80.7% 0.146 175.8)
- #FF9DC3
#FF9DC3
oklch(80.6% 0.124 355.5)
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 #21DEBC, closest first.
No curated palette has a color within ΔE 0.04 of #21DEBC.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Aqua Marine #2EE8BB ΔE 0.030
- Turquoise #40E0D0 ΔE 0.031
- Emerald #06D6A0 ΔE 0.041
- Medium Aquamarine #66CDAA ΔE 0.050
- Medium Turquoise #48D1CC ΔE 0.051
- Seafoam Blue #78D1B6 ΔE 0.053
- Aqua Green #12E193 ΔE 0.059
- Dark Turquoise #00CED1 ΔE 0.063
Use #21DEBC 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.