#21BEC4
Closest named color: Topaz (#13BBAF). oklch(73% 0.119 199.1), rgb(33, 190, 196).
Aa
Black text reads best on this color (9.22:1).
About this color
#21BEC4 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 73%, its chroma 0.119 and its hue 199°. Its hue sits on the cool side of the wheel. The nearest named color is Topaz (#13BBAF), ΔE 0.031 away. Black text reads best on it, at 9.22:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 9.22:1 |
| White text | 2.27:1 |
Values
| HEX | #21BEC4 |
| RGB | rgb(33, 190, 196) |
| HSL | hsl(182, 71%, 45%) |
| OKLCH | oklch(73% 0.119 199.1) |
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 #21BEC4 | 2.27:1 | Fails | Lc -49.2 | Large or bold text, headings |
| Black text on #21BEC4 | 9.22:1 | AAA | Lc 59.6 | Large or bold text, headings |
| #21BEC4 text on white | 2.27:1 | Fails | Lc 44.4 | Non-text elements, placeholder text |
| #21BEC4 text on black | 9.22:1 | AAA | Lc -57.8 | Large or bold text, headings |
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
#DAEFEF
oklch(93.7% 0.022 196.8)
-
Step 200
200
#BAE2E3
oklch(88.5% 0.042 198.3)
-
Step 300
300
#85D0D3
oklch(81% 0.075 199)
-
Step 400
400 (this color)
#21BEC4
oklch(73% 0.119 199.1)
-
Step 500
500
#009DA2
oklch(63.2% 0.107 198.8)
-
Step 600
600
#008488
oklch(55.7% 0.095 198.5)
-
Step 700
700
#006F73
oklch(49.2% 0.084 199.2)
-
Step 800
800
#005B5E
oklch(42.8% 0.073 198.7)
-
Step 900
900
#004C4E
oklch(37.8% 0.064 197.8)
-
Step 950
950
#002D2F
oklch(27% 0.046 199.4)
#21BEC4 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) | #AFB5C5 | 0.121 |
| Deuteranopia (no green cones) | #9AA5C5 | 0.113 |
| Tritanopia (no blue cones) | #00C5BF | 0.024 |
| Achromatopsia (no color) | #ACACAC | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21BEC4
#21BEC4
oklch(73% 0.119 199.1)
- #E9888A
#E9888A
oklch(73.1% 0.119 19.1)
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 #21BEC4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.031
- Turquoise Blue #06B1C4 ΔE 0.039
- Dark Turquoise #00CED1 ΔE 0.044
- Light Sea Green #20B2AA ΔE 0.044
- Medium Turquoise #48D1CC ΔE 0.059
- Greeny Blue #42B395 ΔE 0.065
- Vivid Sky Blue #4CC9F0 ΔE 0.071
- Medium Aquamarine #66CDAA ΔE 0.076
Use #21BEC4 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.