#255E5E
Closest named color: Dark Green Blue (#1F6357). oklch(44.5% 0.059 195.2), rgb(37, 94, 94).
Aa
White text reads best on this color (7.39:1).
About this color
#255E5E is a dark, muted teal or cyan. In OKLCH its lightness is 44%, its chroma 0.059 and its hue 195°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.023 away. White text reads best on it, at 7.39:1.
| Hue family | Teals and cyans |
| Lightness | dark (44%) |
| Chroma | muted (0.059) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.84:1 |
| White text | 7.39:1 |
Values
| HEX | #255E5E |
| RGB | rgb(37, 94, 94) |
| HSL | hsl(180, 44%, 26%) |
| OKLCH | oklch(44.5% 0.059 195.2) |
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 #255E5E | 7.39:1 | AAA | Lc -90.3 | Preferred for body text |
| Black text on #255E5E | 2.84:1 | Fails | Lc 18.5 | Dividers and decoration only |
| #255E5E text on white | 7.39:1 | AAA | Lc 85.5 | Fine for body text |
| #255E5E text on black | 2.84:1 | Fails | Lc -16.5 | 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
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E3ECEC
oklch(93.6% 0.01 197)
-
Step 200
200
#CBDDDD
oklch(88.4% 0.019 196.8)
-
Step 300
300
#A8C8C7
oklch(80.9% 0.034 194.2)
-
Step 400
400
#77ACAB
oklch(70.7% 0.056 194.5)
-
Step 500
500
#519797
oklch(63.1% 0.071 195.5)
-
Step 600
600
#318181
oklch(55.5% 0.077 195.2)
-
Step 700
700
#236D6D
oklch(49% 0.071 195.1)
-
Step 800
800 (this color)
#255E5E
oklch(44.5% 0.059 195.2)
-
Step 900
900
#204949
oklch(37.6% 0.046 195.4)
-
Step 950
950
#142B2B
oklch(27% 0.029 195.6)
#255E5E 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) | #585A5E | 0.061 |
| Deuteranopia (no green cones) | #4F535E | 0.057 |
| Tritanopia (no blue cones) | #00615E | 0.018 |
| Achromatopsia (no color) | #565656 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255E5E
#255E5E
oklch(44.5% 0.059 195.2)
- #714649
#714649
oklch(44.5% 0.059 15.2)
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 #255E5E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.023
- Petrol #005F6A ΔE 0.023
- Dark Aqua #05696B ΔE 0.035
- Deep Teal #00555A ΔE 0.038
- Dark Slate Gray #2F4F4F ΔE 0.047
- Dark Blue Green #005249 ΔE 0.054
- YInMn Blue #415A77 ΔE 0.058
- Dark Aquamarine #017371 ΔE 0.064
Use #255E5E 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.