#255359
Closest named color: Dark Slate Gray (#2F4F4F). oklch(41.3% 0.051 206.7), rgb(37, 83, 89).
Aa
White text reads best on this color (8.53:1).
About this color
#255359 is a dark, muted teal or cyan. In OKLCH its lightness is 41%, its chroma 0.051 and its hue 207°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.018 away. White text reads best on it, at 8.53:1.
| Hue family | Teals and cyans |
| Lightness | dark (41%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.46:1 |
| White text | 8.53:1 |
Values
| HEX | #255359 |
| RGB | rgb(37, 83, 89) |
| HSL | hsl(187, 41%, 25%) |
| OKLCH | oklch(41.3% 0.051 206.7) |
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 #255359 | 8.53:1 | AAA | Lc -93.8 | Preferred for body text |
| Black text on #255359 | 2.46:1 | Fails | Lc 14.8 | Not readable |
| #255359 text on white | 8.53:1 | AAA | Lc 89.2 | Fine for body text |
| #255359 text on black | 2.46:1 | Fails | Lc -13.0 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E4ECED
oklch(93.7% 0.009 205.9)
-
Step 200
200
#CDDCDF
oklch(88.4% 0.017 211)
-
Step 300
300
#ABC6CA
oklch(80.8% 0.03 207.4)
-
Step 400
400
#7EAAB0
oklch(70.8% 0.048 206.6)
-
Step 500
500
#5B949C
oklch(63% 0.061 207.1)
-
Step 600
600
#3F7E87
oklch(55.5% 0.066 207.6)
-
Step 700
700
#306B72
oklch(49.2% 0.062 205.8)
-
Step 800
800 (this color)
#255359
oklch(41.3% 0.051 206.7)
-
Step 900
900
#26484C
oklch(37.8% 0.04 205.4)
-
Step 950
950
#172A2D
oklch(27% 0.025 208.4)
#255359 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) | #4D5059 | 0.050 |
| Deuteranopia (no green cones) | #444A59 | 0.045 |
| Tritanopia (no blue cones) | #005655 | 0.024 |
| Achromatopsia (no color) | #4C4C4C | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255359
#255359
oklch(41.3% 0.051 206.7)
- #64403C
#64403C
oklch(41.2% 0.051 26.5)
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 #255359, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.018
- Deep Teal #00555A ΔE 0.020
- Dark Teal #014D4E ΔE 0.036
- Dark Blue Green #005249 ΔE 0.037
- Petrol #005F6A ΔE 0.041
- Charcoal #264653 ΔE 0.041
- Dark Grey Blue #29465B ΔE 0.044
- Dark Green Blue #1F6357 ΔE 0.054
Use #255359 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.