#257B2A
Closest named color: Tree Green (#2A7E19). oklch(51.4% 0.142 144), rgb(37, 123, 42).
Aa
White text reads best on this color (5.32:1).
About this color
#257B2A is a medium-dark, vivid green. In OKLCH its lightness is 51%, its chroma 0.142 and its hue 144°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Tree Green (#2A7E19), ΔE 0.018 away. White text reads best on it, at 5.32:1.
| Hue family | Greens |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.142) |
| Temperature | in between |
| Nearest name | Tree Green (#2A7E19) |
| Black text | 3.94:1 |
| White text | 5.32:1 |
Values
| HEX | #257B2A |
| RGB | rgb(37, 123, 42) |
| HSL | hsl(123, 54%, 31%) |
| OKLCH | oklch(51.4% 0.142 144) |
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 #257B2A | 5.32:1 | AA | Lc -81.4 | Fine for body text |
| Black text on #257B2A | 3.94:1 | AA large text | Lc 28.0 | Dividers and decoration only |
| #257B2A text on white | 5.32:1 | AA | Lc 76.1 | Fine for body text |
| #257B2A text on black | 3.94:1 | AA large text | Lc -25.6 | Dividers and decoration only |
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 700.
-
Step 50
50
#F2F7F2
oklch(97.1% 0.008 145.5)
-
Step 100
100
#E2EEE2
oklch(93.7% 0.02 145.4)
-
Step 200
200
#CBE0CA
oklch(88.5% 0.037 144)
-
Step 300
300
#A6CDA5
oklch(80.9% 0.069 144.3)
-
Step 400
400
#75B374
oklch(70.8% 0.111 143.9)
-
Step 500
500
#4D9F4E
oklch(63.1% 0.142 143.9)
-
Step 600
600
#2B8930
oklch(55.6% 0.154 143.9)
-
Step 700
700 (this color)
#257B2A
oklch(51.4% 0.142 144)
-
Step 800
800
#1B5F1F
oklch(42.8% 0.118 144)
-
Step 900
900
#1D4E1F
oklch(37.8% 0.093 144.2)
-
Step 950
950
#122E13
oklch(27.1% 0.059 144.4)
#257B2A 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) | #7D6F20 | 0.104 |
| Deuteranopia (no green cones) | #736831 | 0.105 |
| Tritanopia (no blue cones) | #0D786A | 0.089 |
| Achromatopsia (no color) | #6B6B6B | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #257B2A
#257B2A
oklch(51.4% 0.142 144)
- #8E4695
#8E4695
oklch(51.5% 0.143 324)
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 #257B2A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Tree Green #2A7E19 ΔE 0.018
- Jungle Green #048243 ΔE 0.028
- Dark Grass Green #388004 ΔE 0.031
- Green #008000 ΔE 0.035
- Forest Green #228B22 ΔE 0.051
- Emerald Green #028F1E ΔE 0.064
- Sea Green #2E8B57 ΔE 0.065
- Olive Green #677A04 ΔE 0.066
Use #257B2A 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.