#21C2CE
Closest named color: Dark Turquoise (#00CED1). oklch(74.4% 0.122 203.1), rgb(33, 194, 206).
Aa
Black text reads best on this color (9.67:1).
About this color
#21C2CE is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 74%, its chroma 0.122 and its hue 203°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Turquoise (#00CED1), ΔE 0.033 away. Black text reads best on it, at 9.67:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Dark Turquoise (#00CED1) |
| Black text | 9.67:1 |
| White text | 2.17:1 |
Values
| HEX | #21C2CE |
| RGB | rgb(33, 194, 206) |
| HSL | hsl(184, 72%, 47%) |
| OKLCH | oklch(74.4% 0.122 203.1) |
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 #21C2CE | 2.17:1 | Fails | Lc -46.8 | Large or bold text, headings |
| Black text on #21C2CE | 9.67:1 | AAA | Lc 61.8 | Content text, not long reading |
| #21C2CE text on white | 2.17:1 | Fails | Lc 42.2 | Non-text elements, placeholder text |
| #21C2CE text on black | 9.67:1 | AAA | Lc -60.1 | 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 400.
-
Step 50
50
#EEF8F8
oklch(97.2% 0.011 197)
-
Step 100
100
#DAEFF0
oklch(93.7% 0.022 200.2)
-
Step 200
200
#BAE2E5
oklch(88.5% 0.042 202)
-
Step 300
300
#83D0D6
oklch(81% 0.076 202.1)
-
Step 400
400 (this color)
#21C2CE
oklch(74.4% 0.122 203.1)
-
Step 500
500
#009CA6
oklch(63.1% 0.107 202.8)
-
Step 600
600
#00838C
oklch(55.6% 0.095 203.3)
-
Step 700
700
#006E76
oklch(49.1% 0.084 203.6)
-
Step 800
800
#005A61
oklch(42.6% 0.073 204)
-
Step 900
900
#004B51
oklch(37.6% 0.064 204)
-
Step 950
950
#002D30
oklch(27% 0.046 201.8)
#21C2CE 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) | #B2B9CF | 0.122 |
| Deuteranopia (no green cones) | #9BA9CF | 0.112 |
| Tritanopia (no blue cones) | #00CAC5 | 0.030 |
| Achromatopsia (no color) | #B0B0B0 | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21C2CE
#21C2CE
oklch(74.4% 0.122 203.1)
- #EF8C87
#EF8C87
oklch(74.4% 0.121 23.5)
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 #21C2CE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Turquoise #00CED1 ΔE 0.033
- Topaz #13BBAF ΔE 0.046
- Turquoise Blue #06B1C4 ΔE 0.049
- Medium Turquoise #48D1CC ΔE 0.049
- Vivid Sky Blue #4CC9F0 ΔE 0.056
- Light Sea Green #20B2AA ΔE 0.061
- Aqua Blue #02D8E9 ΔE 0.063
- Bright Sky Blue #02CCFE ΔE 0.068
Use #21C2CE 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.