#21BA83
Closest named color: Dark Seafoam (#1FB57A). oklch(70.1% 0.146 162.4), rgb(33, 186, 131).
Aa
Black text reads best on this color (8.41:1).
About this color
#21BA83 is a medium-light, vivid green. In OKLCH its lightness is 70%, its chroma 0.146 and its hue 162°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Seafoam (#1FB57A), ΔE 0.016 away. Black text reads best on it, at 8.41:1.
| Hue family | Greens |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.146) |
| Temperature | in between |
| Nearest name | Dark Seafoam (#1FB57A) |
| Black text | 8.41:1 |
| White text | 2.49:1 |
Values
| HEX | #21BA83 |
| RGB | rgb(33, 186, 131) |
| HSL | hsl(158, 70%, 43%) |
| OKLCH | oklch(70.1% 0.146 162.4) |
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 #21BA83 | 2.49:1 | Fails | Lc -53.5 | Large or bold text, headings |
| Black text on #21BA83 | 8.41:1 | AAA | Lc 55.5 | Large or bold text, headings |
| #21BA83 text on white | 2.49:1 | Fails | Lc 48.5 | Large or bold text, headings |
| #21BA83 text on black | 8.41:1 | AAA | Lc -53.5 | 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
#EFF8F3
oklch(97.1% 0.012 162.1)
-
Step 100
100
#DBF0E5
oklch(93.7% 0.027 163.2)
-
Step 200
200
#BCE4CF
oklch(88.4% 0.051 162.3)
-
Step 300
300
#89D3AF
oklch(80.8% 0.09 162.4)
-
Step 400
400 (this color)
#21BA83
oklch(70.1% 0.146 162.4)
-
Step 500
500
#00A270
oklch(63% 0.137 162.6)
-
Step 600
600
#00895D
oklch(55.7% 0.122 162)
-
Step 700
700
#00734E
oklch(49.1% 0.107 162.4)
-
Step 800
800
#005E3F
oklch(42.6% 0.093 162.3)
-
Step 900
900
#004F34
oklch(37.8% 0.083 162.1)
-
Step 950
950
#002F1E
oklch(27% 0.058 163)
#21BA83 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) | #B7AC80 | 0.140 |
| Deuteranopia (no green cones) | #A59F87 | 0.136 |
| Tritanopia (no blue cones) | #00BAAB | 0.057 |
| Achromatopsia (no color) | #A4A4A4 | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21BA83
#21BA83
oklch(70.1% 0.146 162.4)
- #DB77B7
#DB77B7
oklch(70% 0.146 342.5)
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 #21BA83, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Seafoam #1FB57A ΔE 0.016
- Green Blue #01C08D ΔE 0.018
- Green Teal #0CB577 ΔE 0.021
- Medium Sea Green #3CB371 ΔE 0.025
- Bluey Green #2BB179 ΔE 0.025
- Greenblue #23C48B ΔE 0.029
- Dark Seafoam Green #3EAF76 ΔE 0.031
- Dark Mint Green #20C073 ΔE 0.031
Use #21BA83 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.