#21AFA7
Closest named color: Light Sea Green (#20B2AA). oklch(68.3% 0.112 188.9), rgb(33, 175, 167).
Aa
Black text reads best on this color (7.75:1).
About this color
#21AFA7 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 68%, its chroma 0.112 and its hue 189°. Its hue sits on the cool side of the wheel. The nearest named color is Light Sea Green (#20B2AA), ΔE 0.009 away. Black text reads best on it, at 7.75:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Light Sea Green (#20B2AA) |
| Black text | 7.75:1 |
| White text | 2.70:1 |
Values
| HEX | #21AFA7 |
| RGB | rgb(33, 175, 167) |
| HSL | hsl(177, 68%, 41%) |
| OKLCH | oklch(68.3% 0.112 188.9) |
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 #21AFA7 | 2.70:1 | Fails | Lc -57.2 | Large or bold text, headings |
| Black text on #21AFA7 | 7.75:1 | AAA | Lc 52.0 | Large or bold text, headings |
| #21AFA7 text on white | 2.70:1 | Fails | Lc 52.0 | Large or bold text, headings |
| #21AFA7 text on black | 7.75:1 | AAA | Lc -49.9 | 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
#EFF8F7
oklch(97.2% 0.01 189.1)
-
Step 100
100
#DBEFEC
oklch(93.7% 0.021 186)
-
Step 200
200
#BDE2DE
oklch(88.5% 0.039 188.5)
-
Step 300
300
#8BD0CA
oklch(81% 0.07 189)
-
Step 400
400 (this color)
#21AFA7
oklch(68.3% 0.112 188.9)
-
Step 500
500
#009E97
oklch(63.1% 0.109 189.2)
-
Step 600
600
#00857F
oklch(55.6% 0.096 189.2)
-
Step 700
700
#00706A
oklch(49.1% 0.085 188.3)
-
Step 800
800
#005C57
oklch(42.8% 0.074 188.4)
-
Step 900
900
#004C48
oklch(37.6% 0.065 188.7)
-
Step 950
950
#002E2B
oklch(27.1% 0.047 188)
#21AFA7 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) | #A5A5A7 | 0.120 |
| Deuteranopia (no green cones) | #9297A8 | 0.113 |
| Tritanopia (no blue cones) | #00B4AC | 0.014 |
| Achromatopsia (no color) | #9D9D9D | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21AFA7
#21AFA7
oklch(68.3% 0.112 188.9)
- #D47A8B
#D47A8B
oklch(68.2% 0.113 8.4)
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 #21AFA7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Sea Green #20B2AA ΔE 0.009
- Topaz #13BBAF ΔE 0.033
- Greeny Blue #42B395 ΔE 0.035
- Turquoise Blue #06B1C4 ΔE 0.042
- Persian Green #2A9D8F ΔE 0.055
- Cadet Blue #5F9EA0 ΔE 0.055
- Dull Teal #5F9E8F ΔE 0.056
- Sea #3C9992 ΔE 0.062
Use #21AFA7 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.