#255152
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40.4% 0.049 197.4), rgb(37, 81, 82).
Aa
White text reads best on this color (8.83:1).
About this color
#255152 is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.049 and its hue 197°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.011 away. White text reads best on it, at 8.83:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.37:1 |
| White text | 8.83:1 |
Values
| HEX | #255152 |
| RGB | rgb(37, 81, 82) |
| HSL | hsl(181, 38%, 23%) |
| OKLCH | oklch(40.4% 0.049 197.4) |
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 #255152 | 8.83:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #255152 | 2.37:1 | Fails | Lc 13.9 | Not readable |
| #255152 text on white | 8.83:1 | AAA | Lc 90.1 | Preferred for body text |
| #255152 text on black | 2.37:1 | Fails | Lc -12.2 | Not readable |
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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E4ECEC
oklch(93.7% 0.009 197)
-
Step 200
200
#CEDDDD
oklch(88.6% 0.016 196.9)
-
Step 300
300
#ACC7C7
oklch(81% 0.029 196.6)
-
Step 400
400
#80AAAA
oklch(70.8% 0.045 196.2)
-
Step 500
500
#5E9596
oklch(63.2% 0.058 197.3)
-
Step 600
600
#427F80
oklch(55.6% 0.063 196.9)
-
Step 700
700
#336B6C
oklch(49.1% 0.059 197)
-
Step 800
800 (this color)
#255152
oklch(40.4% 0.049 197.4)
-
Step 900
900
#284849
oklch(37.7% 0.038 198.2)
-
Step 950
950
#182A2A
oklch(26.9% 0.024 195.8)
#255152 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) | #4C4D52 | 0.051 |
| Deuteranopia (no green cones) | #444852 | 0.046 |
| Tritanopia (no blue cones) | #065451 | 0.020 |
| Achromatopsia (no color) | #4A4A4A | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255152
#255152
oklch(40.4% 0.049 197.4)
- #613E3F
#613E3F
oklch(40.5% 0.049 17.6)
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 #255152, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.011
- Deep Teal #00555A ΔE 0.022
- Dark Teal #014D4E ΔE 0.028
- Dark Blue Green #005249 ΔE 0.029
- Charcoal #264653 ΔE 0.037
- Dark Grey Blue #29465B ΔE 0.044
- Petrol #005F6A ΔE 0.050
- Charcoal Grey #3C4142 ΔE 0.054
Use #255152 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.