#21BB78
Closest named color: Dark Mint Green (#20C073). oklch(70.1% 0.156 157.9), rgb(33, 187, 120).
Aa
Black text reads best on this color (8.44:1).
About this color
#21BB78 is a medium-light, vivid green. In OKLCH its lightness is 70%, its chroma 0.156 and its hue 158°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Mint Green (#20C073), ΔE 0.018 away. Black text reads best on it, at 8.44:1.
| Hue family | Greens |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.156) |
| Temperature | in between |
| Nearest name | Dark Mint Green (#20C073) |
| Black text | 8.44:1 |
| White text | 2.48:1 |
Values
| HEX | #21BB78 |
| RGB | rgb(33, 187, 120) |
| HSL | hsl(154, 70%, 43%) |
| OKLCH | oklch(70.1% 0.156 157.9) |
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 #21BB78 | 2.48:1 | Fails | Lc -53.4 | Large or bold text, headings |
| Black text on #21BB78 | 8.44:1 | AAA | Lc 55.7 | Large or bold text, headings |
| #21BB78 text on white | 2.48:1 | Fails | Lc 48.3 | Large or bold text, headings |
| #21BB78 text on black | 8.44:1 | AAA | Lc -53.7 | 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
#EFF8F2
oklch(97.1% 0.012 157)
-
Step 100
100
#DBF0E3
oklch(93.6% 0.028 158.7)
-
Step 200
200
#BCE5CC
oklch(88.6% 0.055 158.3)
-
Step 300
300
#89D4A8
oklch(80.9% 0.098 157.6)
-
Step 400
400 (this color)
#21BB78
oklch(70.1% 0.156 157.9)
-
Step 500
500
#00A366
oklch(63% 0.147 158.1)
-
Step 600
600
#008955
oklch(55.5% 0.129 158.2)
-
Step 700
700
#007447
oklch(49.2% 0.115 158)
-
Step 800
800
#005F39
oklch(42.8% 0.1 157.9)
-
Step 900
900
#004F2F
oklch(37.7% 0.088 158.2)
-
Step 950
950
#002F1A
oklch(26.9% 0.063 158.2)
#21BB78 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) | #B9AC74 | 0.143 |
| Deuteranopia (no green cones) | #A89F7C | 0.141 |
| Tritanopia (no blue cones) | #00BAAA | 0.071 |
| Achromatopsia (no color) | #A4A4A4 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21BB78
#21BB78
oklch(70.1% 0.156 157.9)
- #DB75C0
#DB75C0
oklch(70.1% 0.156 338)
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 #21BB78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Mint Green #20C073 ΔE 0.018
- Dark Seafoam #1FB57A ΔE 0.019
- Green Teal #0CB577 ΔE 0.019
- Medium Sea Green #3CB371 ΔE 0.022
- Cool Green #33B864 ΔE 0.023
- Dark Mint #48C072 ΔE 0.026
- Green Blue #01C08D ΔE 0.027
- Algae Green #21C36F ΔE 0.029
Use #21BB78 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.