#255A72
Closest named color: Petrol (#005F6A). oklch(44.3% 0.068 230.7), rgb(37, 90, 114).
Aa
White text reads best on this color (7.54:1).
About this color
#255A72 is a dark, muted blue. In OKLCH its lightness is 44%, its chroma 0.068 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.029 away. White text reads best on it, at 7.54:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.78:1 |
| White text | 7.54:1 |
Values
| HEX | #255A72 |
| RGB | rgb(37, 90, 114) |
| HSL | hsl(199, 51%, 30%) |
| OKLCH | oklch(44.3% 0.068 230.7) |
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 #255A72 | 7.54:1 | AAA | Lc -90.8 | Preferred for body text |
| Black text on #255A72 | 2.78:1 | Fails | Lc 18.0 | Dividers and decoration only |
| #255A72 text on white | 7.54:1 | AAA | Lc 86.0 | Fine for body text |
| #255A72 text on black | 2.78:1 | Fails | Lc -16.0 | 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
#CBDCE5
oklch(88.4% 0.022 230.6)
-
Step 300
300
#A7C6D6
oklch(80.9% 0.04 230.3)
-
Step 400
400
#77A8C1
oklch(70.6% 0.064 231)
-
Step 500
500
#5193B2
oklch(63.2% 0.082 230.3)
-
Step 600
600
#327C9D
oklch(55.5% 0.088 230.7)
-
Step 700
700
#246987
oklch(49.2% 0.083 230.7)
-
Step 800
800 (this color)
#255A72
oklch(44.3% 0.068 230.7)
-
Step 900
900
#204759
oklch(37.8% 0.054 230.4)
-
Step 950
950
#142934
oklch(26.9% 0.034 232.8)
#255A72 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) | #4E5973 | 0.047 |
| Deuteranopia (no green cones) | #435172 | 0.040 |
| Tritanopia (no blue cones) | #006162 | 0.044 |
| Achromatopsia (no color) | #545454 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255A72
#255A72
oklch(44.3% 0.068 230.7)
- #71482F
#71482F
oklch(44.3% 0.068 51.6)
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 #255A72, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.029
- YInMn Blue #415A77 ΔE 0.031
- Light Navy Blue #2E5A88 ΔE 0.039
- Deep Sea Blue #015482 ΔE 0.041
- Deep Teal #00555A ΔE 0.048
- Light Navy #155084 ΔE 0.050
- Dark Aqua #05696B ΔE 0.053
- Denim #3B638C ΔE 0.054
Use #255A72 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.