#21BB89
Closest named color: Green Blue (#01C08D). oklch(70.5% 0.142 164.7), rgb(33, 187, 137).
Aa
Black text reads best on this color (8.53:1).
About this color
#21BB89 is a medium-light, vivid green. In OKLCH its lightness is 70%, its chroma 0.142 and its hue 165°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Green Blue (#01C08D), ΔE 0.014 away. Black text reads best on it, at 8.53:1.
| Hue family | Greens |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.142) |
| Temperature | in between |
| Nearest name | Green Blue (#01C08D) |
| Black text | 8.53:1 |
| White text | 2.46:1 |
Values
| HEX | #21BB89 |
| RGB | rgb(33, 187, 137) |
| HSL | hsl(161, 70%, 43%) |
| OKLCH | oklch(70.5% 0.142 164.7) |
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 #21BB89 | 2.46:1 | Fails | Lc -52.9 | Large or bold text, headings |
| Black text on #21BB89 | 8.53:1 | AAA | Lc 56.1 | Large or bold text, headings |
| #21BB89 text on white | 2.46:1 | Fails | Lc 47.9 | Large or bold text, headings |
| #21BB89 text on black | 8.53:1 | AAA | Lc -54.1 | 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
#BCE4D1
oklch(88.5% 0.049 164.9)
-
Step 300
300
#88D3B2
oklch(80.8% 0.089 164.8)
-
Step 400
400 (this color)
#21BB89
oklch(70.5% 0.142 164.7)
-
Step 500
500
#00A274
oklch(63.1% 0.134 164.5)
-
Step 600
600
#008861
oklch(55.5% 0.117 164.6)
-
Step 700
700
#007351
oklch(49.2% 0.104 164.3)
-
Step 800
800
#005E42
oklch(42.7% 0.09 164.7)
-
Step 900
900
#004E37
oklch(37.6% 0.079 165.5)
-
Step 950
950
#002F1F
oklch(27% 0.057 164.4)
#21BB89 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) | #B7AD86 | 0.139 |
| Deuteranopia (no green cones) | #A5A08C | 0.134 |
| Tritanopia (no blue cones) | #00BBAD | 0.051 |
| Achromatopsia (no color) | #A5A5A5 | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21BB89
#21BB89
oklch(70.5% 0.142 164.7)
- #DD79B4
#DD79B4
oklch(70.5% 0.142 345)
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 #21BB89, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Green Blue #01C08D ΔE 0.014
- Dark Seafoam #1FB57A ΔE 0.023
- Greenblue #23C48B ΔE 0.026
- Green Teal #0CB577 ΔE 0.028
- Bluey Green #2BB179 ΔE 0.030
- Medium Sea Green #3CB371 ΔE 0.032
- Dark Seafoam Green #3EAF76 ΔE 0.035
- Greeny Blue #42B395 ΔE 0.036
Use #21BB89 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.