#21C18A
Closest named color: Green Blue (#01C08D). oklch(72.1% 0.148 163.3), rgb(33, 193, 138).
Aa
Black text reads best on this color (9.05:1).
About this color
#21C18A is a medium-light, vivid green. In OKLCH its lightness is 72%, its chroma 0.148 and its hue 163°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Green Blue (#01C08D), ΔE 0.008 away. Black text reads best on it, at 9.05:1.
| Hue family | Greens |
| Lightness | medium-light (72%) |
| Chroma | vivid (0.148) |
| Temperature | in between |
| Nearest name | Green Blue (#01C08D) |
| Black text | 9.05:1 |
| White text | 2.31:1 |
Values
| HEX | #21C18A |
| RGB | rgb(33, 193, 138) |
| HSL | hsl(159, 71%, 44%) |
| OKLCH | oklch(72.1% 0.148 163.3) |
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 #21C18A | 2.31:1 | Fails | Lc -50.0 | Large or bold text, headings |
| Black text on #21C18A | 9.05:1 | AAA | Lc 58.8 | Large or bold text, headings |
| #21C18A text on white | 2.31:1 | Fails | Lc 45.2 | Large or bold text, headings |
| #21C18A text on black | 9.05:1 | AAA | Lc -56.9 | 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
#EEF8F3
oklch(97% 0.012 164.8)
-
Step 100
100
#DBF0E5
oklch(93.7% 0.027 163.2)
-
Step 200
200
#BBE4D0
oklch(88.4% 0.051 164.2)
-
Step 300
300
#86D4B0
oklch(80.9% 0.093 163.5)
-
Step 400
400 (this color)
#21C18A
oklch(72.1% 0.148 163.3)
-
Step 500
500
#00A272
oklch(63% 0.135 163.5)
-
Step 600
600
#00895F
oklch(55.7% 0.12 163.1)
-
Step 700
700
#00734F
oklch(49.1% 0.106 163)
-
Step 800
800
#005E40
oklch(42.6% 0.092 163.1)
-
Step 900
900
#004F35
oklch(37.8% 0.082 162.9)
-
Step 950
950
#002F1E
oklch(27% 0.058 163)
#21C18A 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) | #BDB287 | 0.144 |
| Deuteranopia (no green cones) | #ABA58E | 0.140 |
| Tritanopia (no blue cones) | #00C1B2 | 0.057 |
| Achromatopsia (no color) | #AAAAAA | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21C18A
#21C18A
oklch(72.1% 0.148 163.3)
- #E37CBD
#E37CBD
oklch(72% 0.148 342.9)
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 #21C18A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Green Blue #01C08D ΔE 0.008
- Greenblue #23C48B ΔE 0.009
- Dark Mint Green #20C073 ΔE 0.030
- Dark Mint #48C072 ΔE 0.031
- Dark Seafoam #1FB57A ΔE 0.036
- Algae Green #21C36F ΔE 0.037
- Green Teal #0CB577 ΔE 0.039
- Medium Sea Green #3CB371 ΔE 0.042
Use #21C18A 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.