#255A8B
Closest named color: Light Navy Blue (#2E5A88). oklch(45.7% 0.098 249.3), rgb(37, 90, 139).
Aa
White text reads best on this color (7.20:1).
About this color
#255A8B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.098 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy Blue (#2E5A88), ΔE 0.009 away. White text reads best on it, at 7.20:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Light Navy Blue (#2E5A88) |
| Black text | 2.91:1 |
| White text | 7.20:1 |
Values
| HEX | #255A8B |
| RGB | rgb(37, 90, 139) |
| HSL | hsl(209, 58%, 35%) |
| OKLCH | oklch(45.7% 0.098 249.3) |
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 #255A8B | 7.20:1 | AAA | Lc -89.7 | Fine for body text |
| Black text on #255A8B | 2.91:1 | Fails | Lc 19.3 | Dividers and decoration only |
| #255A8B text on white | 7.20:1 | AAA | Lc 84.7 | Fine for body text |
| #255A8B text on black | 2.91:1 | Fails | Lc -17.3 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF5
oklch(93.6% 0.017 250.8)
-
Step 200
200
#CADBEE
oklch(88.5% 0.032 251.1)
-
Step 300
300
#A5C4E5
oklch(80.9% 0.058 250.2)
-
Step 400
400
#73A5D8
oklch(70.7% 0.092 249.7)
-
Step 500
500
#4C8ECD
oklch(63.1% 0.117 249.2)
-
Step 600
600
#2C77BA
oklch(55.6% 0.127 249.2)
-
Step 700
700
#1E64A0
oklch(49.2% 0.118 248.9)
-
Step 800
800 (this color)
#255A8B
oklch(45.7% 0.098 249.3)
-
Step 900
900
#1D4468
oklch(37.7% 0.076 248.9)
-
Step 950
950
#12283D
oklch(27% 0.048 249)
#255A8B 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) | #445C8D | 0.034 |
| Deuteranopia (no green cones) | #35538A | 0.023 |
| Tritanopia (no blue cones) | #00666C | 0.074 |
| Achromatopsia (no color) | #575757 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255A8B
#255A8B
oklch(45.7% 0.098 249.3)
- #794B03
#794B03
oklch(45.5% 0.098 69.3)
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 #255A8B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy Blue #2E5A88 ΔE 0.009
- Dusk Blue #26538D ΔE 0.022
- Denim Blue #3B5B92 ΔE 0.025
- Deep Sea Blue #015482 ΔE 0.031
- Light Navy #155084 ΔE 0.035
- Denim #3B638C ΔE 0.037
- Peacock Blue #016795 ΔE 0.038
- YInMn Blue #415A77 ΔE 0.042
Use #255A8B 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.