#21B372
Closest named color: Green Teal (#0CB577). oklch(67.9% 0.152 157.6), rgb(33, 179, 114).
Aa
Black text reads best on this color (7.75:1).
About this color
#21B372 is a medium-light, vivid green. In OKLCH its lightness is 68%, its chroma 0.152 and its hue 158°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Green Teal (#0CB577), ΔE 0.007 away. Black text reads best on it, at 7.75:1.
| Hue family | Greens |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.152) |
| Temperature | in between |
| Nearest name | Green Teal (#0CB577) |
| Black text | 7.75:1 |
| White text | 2.70:1 |
Values
| HEX | #21B372 |
| RGB | rgb(33, 179, 114) |
| HSL | hsl(153, 69%, 42%) |
| OKLCH | oklch(67.9% 0.152 157.6) |
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 #21B372 | 2.70:1 | Fails | Lc -57.2 | Large or bold text, headings |
| Black text on #21B372 | 7.75:1 | AAA | Lc 52.0 | Large or bold text, headings |
| #21B372 text on white | 2.70:1 | Fails | Lc 52.0 | Large or bold text, headings |
| #21B372 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
#EFF8F2
oklch(97.1% 0.012 157)
-
Step 100
100
#DCF0E3
oklch(93.7% 0.027 157.4)
-
Step 200
200
#BDE4CC
oklch(88.4% 0.052 158.1)
-
Step 300
300
#8BD4A9
oklch(81% 0.095 157.6)
-
Step 400
400 (this color)
#21B372
oklch(67.9% 0.152 157.6)
-
Step 500
500
#00A365
oklch(63% 0.148 157.8)
-
Step 600
600
#008954
oklch(55.5% 0.13 157.7)
-
Step 700
700
#007446
oklch(49.2% 0.116 157.5)
-
Step 800
800
#005F38
oklch(42.7% 0.101 157.3)
-
Step 900
900
#004F2E
oklch(37.6% 0.089 157.5)
-
Step 950
950
#002F1A
oklch(26.9% 0.063 158.2)
#21B372 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) | #B1A46E | 0.139 |
| Deuteranopia (no green cones) | #A19876 | 0.136 |
| Tritanopia (no blue cones) | #00B2A2 | 0.069 |
| Achromatopsia (no color) | #9D9D9D | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21B372
#21B372
oklch(67.9% 0.152 157.6)
- #D270B9
#D270B9
oklch(68% 0.151 337.6)
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 #21B372, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Green Teal #0CB577 ΔE 0.007
- Dark Seafoam #1FB57A ΔE 0.010
- Medium Sea Green #3CB371 ΔE 0.012
- Jade Green #2BAF6A ΔE 0.013
- Bluey Green #2BB179 ΔE 0.013
- Seaweed Green #35AD6B ΔE 0.017
- Dark Seafoam Green #3EAF76 ΔE 0.019
- Cool Green #33B864 ΔE 0.027
Use #21B372 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.