#255E91
Closest named color: Light Navy Blue (#2E5A88). oklch(47% 0.102 248.8), rgb(37, 94, 145).
Aa
White text reads best on this color (6.79:1).
About this color
#255E91 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.102 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy Blue (#2E5A88), ΔE 0.017 away. White text reads best on it, at 6.79:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Light Navy Blue (#2E5A88) |
| Black text | 3.08:1 |
| White text | 6.79:1 |
Values
| HEX | #255E91 |
| RGB | rgb(37, 94, 145) |
| HSL | hsl(208, 59%, 36%) |
| OKLCH | oklch(47% 0.102 248.8) |
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 #255E91 | 6.79:1 | AA | Lc -88.2 | Fine for body text |
| Black text on #255E91 | 3.08:1 | AA large text | Lc 20.9 | Dividers and decoration only |
| #255E91 text on white | 6.79:1 | AA | Lc 83.2 | Fine for body text |
| #255E91 text on black | 3.08:1 | AA large text | Lc -18.8 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CCDBEB
oklch(88.5% 0.027 249.9)
-
Step 300
300
#A9C4E0
oklch(80.9% 0.049 249.4)
-
Step 400
400
#7AA5D0
oklch(70.7% 0.079 249)
-
Step 500
500
#568EC4
oklch(63.1% 0.101 248.9)
-
Step 600
600
#3A77B0
oklch(55.5% 0.109 249)
-
Step 700
700 (this color)
#255E91
oklch(47% 0.102 248.8)
-
Step 800
800
#25527B
oklch(42.7% 0.084 248.5)
-
Step 900
900
#234463
oklch(37.7% 0.066 248.6)
-
Step 950
950
#15283A
oklch(27% 0.042 248.4)
#255E91 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) | #476093 | 0.036 |
| Deuteranopia (no green cones) | #375690 | 0.026 |
| Tritanopia (no blue cones) | #006A70 | 0.076 |
| Achromatopsia (no color) | #5B5B5B | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255E91
#255E91
oklch(47% 0.102 248.8)
- #7F4E02
#7F4E02
oklch(46.9% 0.102 68.5)
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 #255E91, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy Blue #2E5A88 ΔE 0.017
- Denim Blue #3B5B92 ΔE 0.021
- Peacock Blue #016795 ΔE 0.027
- Denim #3B638C ΔE 0.029
- Dusk Blue #26538D ΔE 0.032
- Dusky Blue #475F94 ΔE 0.036
- Deep Sea Blue #015482 ΔE 0.044
- YInMn Blue #415A77 ΔE 0.047
Use #255E91 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.