#21AAA8
Closest named color: Light Sea Green (#20B2AA). oklch(67% 0.109 193.3), rgb(33, 170, 168).
Aa
Black text reads best on this color (7.37:1).
About this color
#21AAA8 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 67%, its chroma 0.109 and its hue 193°. Its hue sits on the cool side of the wheel. The nearest named color is Light Sea Green (#20B2AA), ΔE 0.023 away. Black text reads best on it, at 7.37:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Light Sea Green (#20B2AA) |
| Black text | 7.37:1 |
| White text | 2.84:1 |
Values
| HEX | #21AAA8 |
| RGB | rgb(33, 170, 168) |
| HSL | hsl(179, 67%, 40%) |
| OKLCH | oklch(67% 0.109 193.3) |
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 #21AAA8 | 2.84:1 | Fails | Lc -59.4 | Large or bold text, headings |
| Black text on #21AAA8 | 7.37:1 | AAA | Lc 49.9 | Large or bold text, headings |
| #21AAA8 text on white | 2.84:1 | Fails | Lc 54.1 | Large or bold text, headings |
| #21AAA8 text on black | 7.37:1 | AAA | Lc -47.7 | 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
#DCEEED
oklch(93.6% 0.019 192.8)
-
Step 200
200
#BEE1E0
oklch(88.4% 0.037 194.4)
-
Step 300
300
#8CCFCD
oklch(80.9% 0.068 193.5)
-
Step 400
400 (this color)
#21AAA8
oklch(67% 0.109 193.3)
-
Step 500
500
#009E9C
oklch(63.2% 0.108 193.2)
-
Step 600
600
#008483
oklch(55.5% 0.095 193.8)
-
Step 700
700
#006F6E
oklch(49% 0.084 193.7)
-
Step 800
800
#005B5A
oklch(42.6% 0.073 193.5)
-
Step 900
900
#004C4B
oklch(37.7% 0.064 193.2)
-
Step 950
950
#002D2D
oklch(26.9% 0.046 194.8)
#21AAA8 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) | #9FA1A8 | 0.114 |
| Deuteranopia (no green cones) | #8C93A9 | 0.107 |
| Tritanopia (no blue cones) | #00AFA9 | 0.015 |
| Achromatopsia (no color) | #999999 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21AAA8
#21AAA8
oklch(67% 0.109 193.3)
- #CF7882
#CF7882
oklch(67% 0.109 13.1)
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 #21AAA8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Sea Green #20B2AA ΔE 0.023
- Turquoise Blue #06B1C4 ΔE 0.041
- Persian Green #2A9D8F ΔE 0.045
- Cadet Blue #5F9EA0 ΔE 0.046
- Greeny Blue #42B395 ΔE 0.047
- Topaz #13BBAF ΔE 0.048
- Dull Teal #5F9E8F ΔE 0.050
- Sea #3C9992 ΔE 0.050
Use #21AAA8 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.