#255B4A
Closest named color: Dark Green Blue (#1F6357). oklch(42.9% 0.064 169.8), rgb(37, 91, 74).
Aa
White text reads best on this color (7.85:1).
About this color
#255B4A is a dark, muted green. In OKLCH its lightness is 43%, its chroma 0.064 and its hue 170°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.027 away. White text reads best on it, at 7.85:1.
| Hue family | Greens |
| Lightness | dark (43%) |
| Chroma | muted (0.064) |
| Temperature | in between |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.67:1 |
| White text | 7.85:1 |
Values
| HEX | #255B4A |
| RGB | rgb(37, 91, 74) |
| HSL | hsl(161, 42%, 25%) |
| OKLCH | oklch(42.9% 0.064 169.8) |
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 #255B4A | 7.85:1 | AAA | Lc -91.8 | Preferred for body text |
| Black text on #255B4A | 2.67:1 | Fails | Lc 16.9 | Dividers and decoration only |
| #255B4A text on white | 7.85:1 | AAA | Lc 87.1 | Fine for body text |
| #255B4A text on black | 2.67:1 | Fails | Lc -15.0 | 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 800.
-
Step 50
50
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E3ECE9
oklch(93.5% 0.01 174.3)
-
Step 200
200
#CCDED7
oklch(88.5% 0.021 170.6)
-
Step 300
300
#AAC9BD
oklch(81% 0.037 170)
-
Step 400
400
#7BAD9B
oklch(70.7% 0.059 170.2)
-
Step 500
500
#569982
oklch(63.2% 0.078 169.6)
-
Step 600
600
#38836C
oklch(55.6% 0.083 170.3)
-
Step 700
700
#2A6F5A
oklch(49.2% 0.078 169.9)
-
Step 800
800 (this color)
#255B4A
oklch(42.9% 0.064 169.8)
-
Step 900
900
#234A3D
oklch(37.6% 0.05 169.6)
-
Step 950
950
#152C24
oklch(27.1% 0.033 169.4)
#255B4A 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) | #595549 | 0.067 |
| Deuteranopia (no green cones) | #504F4B | 0.063 |
| Tritanopia (no blue cones) | #0A5C56 | 0.022 |
| Achromatopsia (no color) | #525252 | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255B4A
#255B4A
oklch(42.9% 0.064 169.8)
- #6A4155
#6A4155
oklch(43% 0.063 349.4)
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 #255B4A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.027
- Pine #2B5D34 ΔE 0.036
- Dark Blue Green #005249 ΔE 0.039
- Spruce #0A5F38 ΔE 0.039
- Deep Teal #00555A ΔE 0.042
- Dark Slate Gray #2F4F4F ΔE 0.044
- Petrol #005F6A ΔE 0.050
- Dark Teal #014D4E ΔE 0.057
Use #255B4A 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.