#255B6B
Closest named color: Petrol (#005F6A). oklch(44.2% 0.062 220.4), rgb(37, 91, 107).
Aa
White text reads best on this color (7.53:1).
About this color
#255B6B is a dark, muted teal or cyan. In OKLCH its lightness is 44%, its chroma 0.062 and its hue 220°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.020 away. White text reads best on it, at 7.53:1.
| Hue family | Teals and cyans |
| Lightness | dark (44%) |
| Chroma | muted (0.062) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.78:1 |
| White text | 7.53:1 |
Values
| HEX | #255B6B |
| RGB | rgb(37, 91, 107) |
| HSL | hsl(194, 49%, 28%) |
| OKLCH | oklch(44.2% 0.062 220.4) |
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 #255B6B | 7.53:1 | AAA | Lc -90.8 | Preferred for body text |
| Black text on #255B6B | 2.78:1 | Fails | Lc 18.0 | Dividers and decoration only |
| #255B6B text on white | 7.53:1 | AAA | Lc 86.0 | Fine for body text |
| #255B6B text on black | 2.78:1 | Fails | Lc -16.1 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3ECEF
oklch(93.7% 0.01 219.6)
-
Step 200
200
#CBDDE2
oklch(88.6% 0.021 216.2)
-
Step 300
300
#A8C7D1
oklch(81% 0.036 219.3)
-
Step 400
400
#78AABA
oklch(70.8% 0.058 219.8)
-
Step 500
500
#5294A9
oklch(63.1% 0.074 220.7)
-
Step 600
600
#337E94
oklch(55.6% 0.08 220.4)
-
Step 700
700
#246A7E
oklch(49% 0.075 220.5)
-
Step 800
800 (this color)
#255B6B
oklch(44.2% 0.062 220.4)
-
Step 900
900
#214853
oklch(37.8% 0.048 218.6)
-
Step 950
950
#142A31
oklch(27% 0.031 220.6)
#255B6B 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) | #51596C | 0.051 |
| Deuteranopia (no green cones) | #47516B | 0.046 |
| Tritanopia (no blue cones) | #006060 | 0.033 |
| Achromatopsia (no color) | #545454 | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255B6B
#255B6B
oklch(44.2% 0.062 220.4)
- #714738
#714738
oklch(44.2% 0.063 40.4)
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 #255B6B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.020
- YInMn Blue #415A77 ΔE 0.038
- Deep Teal #00555A ΔE 0.040
- Dark Aqua #05696B ΔE 0.045
- Dark Green Blue #1F6357 ΔE 0.049
- Dark Slate Gray #2F4F4F ΔE 0.051
- Light Navy Blue #2E5A88 ΔE 0.051
- Deep Sea Blue #015482 ΔE 0.052
Use #255B6B 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.