#21CCB6
Closest named color: Dark Turquoise (#00CED1). oklch(76% 0.132 181.1), rgb(33, 204, 182).
Aa
Black text reads best on this color (10.37:1).
About this color
#21CCB6 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 76%, its chroma 0.132 and its hue 181°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Turquoise (#00CED1), ΔE 0.038 away. Black text reads best on it, at 10.37:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (76%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Dark Turquoise (#00CED1) |
| Black text | 10.37:1 |
| White text | 2.02:1 |
Values
| HEX | #21CCB6 |
| RGB | rgb(33, 204, 182) |
| HSL | hsl(172, 72%, 46%) |
| OKLCH | oklch(76% 0.132 181.1) |
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 #21CCB6 | 2.02:1 | Fails | Lc -43.2 | Non-text elements, placeholder text |
| Black text on #21CCB6 | 10.37:1 | AAA | Lc 65.1 | Content text, not long reading |
| #21CCB6 text on white | 2.02:1 | Fails | Lc 38.8 | Non-text elements, placeholder text |
| #21CCB6 text on black | 10.37:1 | AAA | Lc -63.6 | 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
#E9FAF6
oklch(97.1% 0.019 180.3)
-
Step 100
100
#CFF3EB
oklch(93.6% 0.039 180.5)
-
Step 200
200
#A3EADC
oklch(88.6% 0.073 180.9)
-
Step 300
300 (this color)
#21CCB6
oklch(76% 0.132 181.1)
-
Step 400
400
#00BAA5
oklch(70.7% 0.128 180.9)
-
Step 500
500
#009F8D
oklch(63% 0.114 181)
-
Step 600
600
#008677
oklch(55.6% 0.1 181.4)
-
Step 700
700
#007164
oklch(49.2% 0.089 181.2)
-
Step 800
800
#005C51
oklch(42.6% 0.077 181.1)
-
Step 900
900
#004D44
oklch(37.7% 0.068 181.7)
-
Step 950
950
#002E28
oklch(27% 0.049 181.5)
#21CCB6 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) | #C2BFB5 | 0.139 |
| Deuteranopia (no green cones) | #ADB0B8 | 0.132 |
| Tritanopia (no blue cones) | #00D0C5 | 0.021 |
| Achromatopsia (no color) | #B6B6B6 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21CCB6
#21CCB6
oklch(76% 0.132 181.1)
- #F58CAC
#F58CAC
oklch(76.1% 0.132 1.2)
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 #21CCB6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Turquoise #00CED1 ΔE 0.038
- Medium Aquamarine #66CDAA ΔE 0.038
- Medium Turquoise #48D1CC ΔE 0.038
- Topaz #13BBAF ΔE 0.049
- Emerald #06D6A0 ΔE 0.049
- Seafoam Blue #78D1B6 ΔE 0.055
- Greenblue #23C48B ΔE 0.058
- Pale Teal #82CBB2 ΔE 0.060
Use #21CCB6 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.