#21C675
Closest named color: Algae Green (#21C36F). oklch(72.9% 0.173 154.9), rgb(33, 198, 117).
Aa
Black text reads best on this color (9.39:1).
About this color
#21C675 is a medium-light, vivid green. In OKLCH its lightness is 73%, its chroma 0.173 and its hue 155°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Algae Green (#21C36F), ΔE 0.010 away. Black text reads best on it, at 9.39:1.
| Hue family | Greens |
| Lightness | medium-light (73%) |
| Chroma | vivid (0.173) |
| Temperature | in between |
| Nearest name | Algae Green (#21C36F) |
| Black text | 9.39:1 |
| White text | 2.23:1 |
Values
| HEX | #21C675 |
| RGB | rgb(33, 198, 117) |
| HSL | hsl(151, 71%, 45%) |
| OKLCH | oklch(72.9% 0.173 154.9) |
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 #21C675 | 2.23:1 | Fails | Lc -48.2 | Large or bold text, headings |
| Black text on #21C675 | 9.39:1 | AAA | Lc 60.5 | Content text, not long reading |
| #21C675 text on white | 2.23:1 | Fails | Lc 43.5 | Non-text elements, placeholder text |
| #21C675 text on black | 9.39:1 | AAA | Lc -58.7 | 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
#EEF9F1
oklch(97.2% 0.016 154.5)
-
Step 100
100
#DAF0E1
oklch(93.5% 0.031 156)
-
Step 200
200
#BBE5C8
oklch(88.4% 0.059 154.9)
-
Step 300
300
#85D6A2
oklch(81% 0.109 155)
-
Step 400
400 (this color)
#21C675
oklch(72.9% 0.173 154.9)
-
Step 500
500
#00A45D
oklch(63.1% 0.157 154.8)
-
Step 600
600
#008A4E
oklch(55.6% 0.137 155)
-
Step 700
700
#007440
oklch(49.1% 0.122 154.8)
-
Step 800
800
#005F34
oklch(42.6% 0.105 155.1)
-
Step 900
900
#004F2A
oklch(37.6% 0.093 154.9)
-
Step 950
950
#003017
oklch(27.1% 0.068 154.6)
#21C675 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) | #C5B56F | 0.153 |
| Deuteranopia (no green cones) | #B3A87B | 0.151 |
| Tritanopia (no blue cones) | #00C4B2 | 0.085 |
| Achromatopsia (no color) | #ADADAD | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21C675
#21C675
oklch(72.9% 0.173 154.9)
- #E779D2
#E779D2
oklch(72.9% 0.172 334.8)
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 #21C675, closest first.
No curated palette has a color within ΔE 0.04 of #21C675.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Algae Green #21C36F ΔE 0.010
- Dark Mint Green #20C073 ΔE 0.017
- Dark Mint #48C072 ΔE 0.021
- Seaweed #18D17B ΔE 0.030
- Greenblue #23C48B ΔE 0.031
- Cool Green #33B864 ΔE 0.039
- Green Blue #01C08D ΔE 0.041
- Shamrock Green #02C14D ΔE 0.045
Use #21C675 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.