#255B4C
Closest named color: Dark Green Blue (#1F6357). oklch(43% 0.063 172.4), rgb(37, 91, 76).
Aa
White text reads best on this color (7.83:1).
About this color
#255B4C is a dark, muted teal or cyan. In OKLCH its lightness is 43%, its chroma 0.063 and its hue 172°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.026 away. White text reads best on it, at 7.83:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.67:1 |
| White text | 7.83:1 |
Values
| HEX | #255B4C |
| RGB | rgb(37, 91, 76) |
| HSL | hsl(163, 42%, 25%) |
| OKLCH | oklch(43% 0.063 172.4) |
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 #255B4C | 7.83:1 | AAA | Lc -91.8 | Preferred for body text |
| Black text on #255B4C | 2.67:1 | Fails | Lc 17.0 | Dividers and decoration only |
| #255B4C text on white | 7.83:1 | AAA | Lc 87.0 | Fine for body text |
| #255B4C text on black | 2.67:1 | Fails | Lc -15.1 | 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
#F2F6F5
oklch(97% 0.004 179.7)
-
Step 100
100
#E3ECE9
oklch(93.5% 0.01 174.3)
-
Step 200
200
#CCDED8
oklch(88.5% 0.021 173.9)
-
Step 300
300
#AAC9BE
oklch(81% 0.037 171.9)
-
Step 400
400
#7BAD9D
oklch(70.7% 0.058 172.7)
-
Step 500
500
#569885
oklch(63% 0.074 173.3)
-
Step 600
600
#38836E
oklch(55.6% 0.082 172.2)
-
Step 700
700
#296F5C
oklch(49.2% 0.077 172.1)
-
Step 800
800 (this color)
#255B4C
oklch(43% 0.063 172.4)
-
Step 900
900
#234A3F
oklch(37.7% 0.049 173.1)
-
Step 950
950
#152B25
oklch(26.9% 0.03 174.4)
#255B4C 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) | #58554B | 0.065 |
| Deuteranopia (no green cones) | #504F4D | 0.063 |
| Tritanopia (no blue cones) | #085C57 | 0.021 |
| Achromatopsia (no color) | #525252 | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255B4C
#255B4C
oklch(43% 0.063 172.4)
- #6B4153
#6B4153
oklch(43.1% 0.063 352.8)
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 #255B4C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.026
- Dark Blue Green #005249 ΔE 0.039
- Pine #2B5D34 ΔE 0.039
- Deep Teal #00555A ΔE 0.040
- Dark Slate Gray #2F4F4F ΔE 0.042
- Spruce #0A5F38 ΔE 0.042
- Petrol #005F6A ΔE 0.047
- Dark Aqua #05696B ΔE 0.055
Use #255B4C 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.