#12B57D
Closest named color: Dark Seafoam (#1FB57A). oklch(68.5% 0.147 161.9), rgb(18, 181, 125).
Aa
Black text reads best on this color (7.93:1).
About this color
#12B57D is a medium-light, vivid green. In OKLCH its lightness is 68%, its chroma 0.147 and its hue 162°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Seafoam (#1FB57A), ΔE 0.004 away. Black text reads best on it, at 7.93:1.
| Hue family | Greens |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.147) |
| Temperature | in between |
| Nearest name | Dark Seafoam (#1FB57A) |
| Black text | 7.93:1 |
| White text | 2.64:1 |
Values
| HEX | #12B57D |
| RGB | rgb(18, 181, 125) |
| HSL | hsl(159, 82%, 39%) |
| OKLCH | oklch(68.5% 0.147 161.9) |
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 #12B57D | 2.64:1 | Fails | Lc -56.1 | Large or bold text, headings |
| Black text on #12B57D | 7.93:1 | AAA | Lc 53.1 | Large or bold text, headings |
| #12B57D text on white | 2.64:1 | Fails | Lc 51.0 | Large or bold text, headings |
| #12B57D text on black | 7.93:1 | AAA | Lc -51.0 | 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
#DBF0E4
oklch(93.6% 0.027 160.9)
-
Step 200
200
#BCE4CF
oklch(88.4% 0.051 162.3)
-
Step 300
300
#88D4AE
oklch(81% 0.093 161.6)
-
Step 400
400 (this color)
#12B57D
oklch(68.5% 0.147 161.9)
-
Step 500
500
#00A36F
oklch(63.2% 0.139 161.8)
-
Step 600
600
#00895D
oklch(55.7% 0.122 162)
-
Step 700
700
#00734D
oklch(49.1% 0.108 161.8)
-
Step 800
800
#005E3F
oklch(42.6% 0.093 162.3)
-
Step 900
900
#004F34
oklch(37.8% 0.083 162.1)
-
Step 950
950
#002F1D
oklch(27% 0.059 161.7)
#12B57D 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) | #B2A77A | 0.141 |
| Deuteranopia (no green cones) | #A09A81 | 0.137 |
| Tritanopia (no blue cones) | #00B5A6 | 0.059 |
| Achromatopsia (no color) | #9F9F9F | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #12B57D
#12B57D
oklch(68.5% 0.147 161.9)
- #D672B3
#D672B3
oklch(68.5% 0.147 342.1)
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 #12B57D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Seafoam #1FB57A ΔE 0.004
- Green Teal #0CB577 ΔE 0.008
- Bluey Green #2BB179 ΔE 0.012
- Medium Sea Green #3CB371 ΔE 0.018
- Dark Seafoam Green #3EAF76 ΔE 0.020
- Jade Green #2BAF6A ΔE 0.025
- Seaweed Green #35AD6B ΔE 0.027
- Green Blue #01C08D ΔE 0.033
Use #12B57D 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.