#255D8B
Closest named color: Light Navy Blue (#2E5A88). oklch(46.4% 0.095 246.7), rgb(37, 93, 139).
Aa
White text reads best on this color (6.96:1).
About this color
#255D8B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.095 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy Blue (#2E5A88), ΔE 0.011 away. White text reads best on it, at 6.96:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Light Navy Blue (#2E5A88) |
| Black text | 3.01:1 |
| White text | 6.96:1 |
Values
| HEX | #255D8B |
| RGB | rgb(37, 93, 139) |
| HSL | hsl(207, 58%, 35%) |
| OKLCH | oklch(46.4% 0.095 246.7) |
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 #255D8B | 6.96:1 | AA | Lc -88.8 | Fine for body text |
| Black text on #255D8B | 3.01:1 | AA large text | Lc 20.2 | Dividers and decoration only |
| #255D8B text on white | 6.96:1 | AA | Lc 83.8 | Fine for body text |
| #255D8B text on black | 3.01:1 | AA large text | Lc -18.1 | 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 700.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF2
oklch(93.6% 0.013 244.3)
-
Step 200
200
#CCDBE9
oklch(88.4% 0.025 246.2)
-
Step 300
300
#A9C4DD
oklch(80.8% 0.046 246.3)
-
Step 400
400
#7BA5CC
oklch(70.6% 0.073 247)
-
Step 500
500
#588FBF
oklch(63.2% 0.093 246.3)
-
Step 600
600
#3C78AC
oklch(55.6% 0.103 247.1)
-
Step 700
700 (this color)
#255D8B
oklch(46.4% 0.095 246.7)
-
Step 800
800
#275278
oklch(42.6% 0.08 247.6)
-
Step 900
900
#244460
oklch(37.6% 0.061 246.7)
-
Step 950
950
#162838
oklch(26.9% 0.038 246.6)
#255D8B 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) | #485F8D | 0.038 |
| Deuteranopia (no green cones) | #3A558A | 0.028 |
| Tritanopia (no blue cones) | #00686D | 0.070 |
| Achromatopsia (no color) | #595959 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255D8B
#255D8B
oklch(46.4% 0.095 246.7)
- #7C4D10
#7C4D10
oklch(46.4% 0.095 66.9)
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 #255D8B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy Blue #2E5A88 ΔE 0.011
- Denim Blue #3B5B92 ΔE 0.025
- Denim #3B638C ΔE 0.029
- Dusk Blue #26538D ΔE 0.031
- Peacock Blue #016795 ΔE 0.031
- Deep Sea Blue #015482 ΔE 0.037
- YInMn Blue #415A77 ΔE 0.040
- Dusky Blue #475F94 ΔE 0.040
Use #255D8B 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.