#12C577
Closest named color: Algae Green (#21C36F). oklch(72.5% 0.172 156.2), rgb(18, 197, 119).
Aa
Black text reads best on this color (9.27:1).
About this color
#12C577 is a medium-light, vivid green. In OKLCH its lightness is 73%, its chroma 0.172 and its hue 156°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Algae Green (#21C36F), ΔE 0.009 away. Black text reads best on it, at 9.27:1.
| Hue family | Greens |
| Lightness | medium-light (73%) |
| Chroma | vivid (0.172) |
| Temperature | in between |
| Nearest name | Algae Green (#21C36F) |
| Black text | 9.27:1 |
| White text | 2.26:1 |
Values
| HEX | #12C577 |
| RGB | rgb(18, 197, 119) |
| HSL | hsl(154, 83%, 42%) |
| OKLCH | oklch(72.5% 0.172 156.2) |
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 #12C577 | 2.26:1 | Fails | Lc -48.8 | Large or bold text, headings |
| Black text on #12C577 | 9.27:1 | AAA | Lc 60.0 | Large or bold text, headings |
| #12C577 text on white | 2.26:1 | Fails | Lc 44.0 | Non-text elements, placeholder text |
| #12C577 text on black | 9.27:1 | AAA | Lc -58.2 | 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
#DAF1E1
oklch(93.7% 0.032 155.4)
-
Step 200
200
#BAE6C9
oklch(88.6% 0.061 156.1)
-
Step 300
300
#84D6A4
oklch(81% 0.108 156.3)
-
Step 400
400 (this color)
#12C577
oklch(72.5% 0.172 156.2)
-
Step 500
500
#00A461
oklch(63.2% 0.153 156.1)
-
Step 600
600
#008A51
oklch(55.7% 0.135 156.2)
-
Step 700
700
#007443
oklch(49.1% 0.119 156.1)
-
Step 800
800
#005F36
oklch(42.7% 0.103 156.1)
-
Step 900
900
#004F2C
oklch(37.6% 0.091 156.1)
-
Step 950
950
#002F18
oklch(26.8% 0.065 156.1)
#12C577 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) | #C4B472 | 0.155 |
| Deuteranopia (no green cones) | #B1A77C | 0.151 |
| Tritanopia (no blue cones) | #00C3B1 | 0.082 |
| Achromatopsia (no color) | #ACACAC | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #12C577
#12C577
oklch(72.5% 0.172 156.2)
- #E777CF
#E777CF
oklch(72.5% 0.173 335.9)
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 #12C577, closest first.
No curated palette has a color within ΔE 0.04 of #12C577.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Algae Green #21C36F ΔE 0.009
- Dark Mint Green #20C073 ΔE 0.014
- Dark Mint #48C072 ΔE 0.021
- Greenblue #23C48B ΔE 0.028
- Seaweed #18D17B ΔE 0.034
- Green Blue #01C08D ΔE 0.036
- Cool Green #33B864 ΔE 0.037
- Shamrock Green #02C14D ΔE 0.046
Use #12C577 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.