#255A6F
Closest named color: Petrol (#005F6A). oklch(44.1% 0.065 227.2), rgb(37, 90, 111).
Aa
White text reads best on this color (7.57:1).
About this color
#255A6F is a dark, muted teal or cyan. In OKLCH its lightness is 44%, its chroma 0.065 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.026 away. White text reads best on it, at 7.57:1.
| Hue family | Teals and cyans |
| Lightness | dark (44%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.77:1 |
| White text | 7.57:1 |
Values
| HEX | #255A6F |
| RGB | rgb(37, 90, 111) |
| HSL | hsl(197, 50%, 29%) |
| OKLCH | oklch(44.1% 0.065 227.2) |
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 #255A6F | 7.57:1 | AAA | Lc -90.9 | Preferred for body text |
| Black text on #255A6F | 2.77:1 | Fails | Lc 17.9 | Dividers and decoration only |
| #255A6F text on white | 7.57:1 | AAA | Lc 86.1 | Fine for body text |
| #255A6F text on black | 2.77:1 | Fails | Lc -15.9 | 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
#E3EBF0
oklch(93.5% 0.011 234.8)
-
Step 200
200
#CBDCE4
oklch(88.4% 0.021 227.6)
-
Step 300
300
#A8C6D4
oklch(80.9% 0.038 227.7)
-
Step 400
400
#78A9BF
oklch(70.8% 0.061 227.6)
-
Step 500
500
#5293AE
oklch(63.1% 0.078 227)
-
Step 600
600
#337D9A
oklch(55.6% 0.085 227.3)
-
Step 700
700
#256984
oklch(49% 0.079 228.2)
-
Step 800
800 (this color)
#255A6F
oklch(44.1% 0.065 227.2)
-
Step 900
900
#214757
oklch(37.7% 0.051 227.9)
-
Step 950
950
#142A33
oklch(27.1% 0.033 226.5)
#255A6F 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) | #4F5870 | 0.049 |
| Deuteranopia (no green cones) | #44516F | 0.041 |
| Tritanopia (no blue cones) | #006061 | 0.039 |
| Achromatopsia (no color) | #545454 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255A6F
#255A6F
oklch(44.1% 0.065 227.2)
- #714733
#714733
oklch(44.1% 0.066 46)
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 #255A6F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.026
- YInMn Blue #415A77 ΔE 0.034
- Light Navy Blue #2E5A88 ΔE 0.044
- Deep Teal #00555A ΔE 0.044
- Deep Sea Blue #015482 ΔE 0.045
- Dark Aqua #05696B ΔE 0.051
- Light Navy #155084 ΔE 0.054
- Dark Slate Gray #2F4F4F ΔE 0.054
Use #255A6F 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.