#21AFB2
Closest named color: Light Sea Green (#20B2AA). oklch(68.7% 0.111 197.2), rgb(33, 175, 178).
Aa
Black text reads best on this color (7.83:1).
About this color
#21AFB2 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 69%, its chroma 0.111 and its hue 197°. Its hue sits on the cool side of the wheel. The nearest named color is Light Sea Green (#20B2AA), ΔE 0.017 away. Black text reads best on it, at 7.83:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Light Sea Green (#20B2AA) |
| Black text | 7.83:1 |
| White text | 2.67:1 |
Values
| HEX | #21AFB2 |
| RGB | rgb(33, 175, 178) |
| HSL | hsl(181, 69%, 41%) |
| OKLCH | oklch(68.7% 0.111 197.2) |
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 #21AFB2 | 2.67:1 | Fails | Lc -56.7 | Large or bold text, headings |
| Black text on #21AFB2 | 7.83:1 | AAA | Lc 52.5 | Large or bold text, headings |
| #21AFB2 text on white | 2.67:1 | Fails | Lc 51.6 | Large or bold text, headings |
| #21AFB2 text on black | 7.83:1 | AAA | Lc -50.3 | 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
#EFF7F7
oklch(97% 0.008 197)
-
Step 100
100
#DBEEEE
oklch(93.5% 0.02 196.8)
-
Step 200
200
#BDE1E2
oklch(88.4% 0.038 198.6)
-
Step 300
300
#8ACFD0
oklch(80.9% 0.069 197)
-
Step 400
400 (this color)
#21AFB2
oklch(68.7% 0.111 197.2)
-
Step 500
500
#009DA0
oklch(63.1% 0.107 197.2)
-
Step 600
600
#008486
oklch(55.6% 0.095 196.7)
-
Step 700
700
#006F71
oklch(49.1% 0.084 197)
-
Step 800
800
#005B5D
oklch(42.7% 0.073 197.4)
-
Step 900
900
#004C4D
oklch(37.8% 0.064 196.3)
-
Step 950
950
#002D2E
oklch(27% 0.046 197.1)
#21AFB2 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) | #A2A6B2 | 0.114 |
| Deuteranopia (no green cones) | #8F98B3 | 0.107 |
| Tritanopia (no blue cones) | #00B5B0 | 0.019 |
| Achromatopsia (no color) | #9E9E9E | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21AFB2
#21AFB2
oklch(68.7% 0.111 197.2)
- #D67D81
#D67D81
oklch(68.7% 0.111 17.5)
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 #21AFB2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Sea Green #20B2AA ΔE 0.017
- Turquoise Blue #06B1C4 ΔE 0.026
- Topaz #13BBAF ΔE 0.037
- Greeny Blue #42B395 ΔE 0.049
- Cadet Blue #5F9EA0 ΔE 0.054
- Dull Teal #5F9E8F ΔE 0.062
- Persian Green #2A9D8F ΔE 0.063
- Sea #3C9992 ΔE 0.067
Use #21AFB2 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.