#255F91
Closest named color: Light Navy Blue (#2E5A88). oklch(47.2% 0.101 247.9), rgb(37, 95, 145).
Aa
White text reads best on this color (6.72:1).
About this color
#255F91 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.101 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy Blue (#2E5A88), ΔE 0.019 away. White text reads best on it, at 6.72:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Light Navy Blue (#2E5A88) |
| Black text | 3.12:1 |
| White text | 6.72:1 |
Values
| HEX | #255F91 |
| RGB | rgb(37, 95, 145) |
| HSL | hsl(208, 59%, 36%) |
| OKLCH | oklch(47.2% 0.101 247.9) |
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 #255F91 | 6.72:1 | AA | Lc -87.9 | Fine for body text |
| Black text on #255F91 | 3.12:1 | AA large text | Lc 21.2 | Dividers and decoration only |
| #255F91 text on white | 6.72:1 | AA | Lc 82.9 | Fine for body text |
| #255F91 text on black | 3.12:1 | AA large text | Lc -19.1 | 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
#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
#A8C4DF
oklch(80.8% 0.049 247.5)
-
Step 400
400
#79A5CF
oklch(70.6% 0.078 247.8)
-
Step 500
500
#568EC3
oklch(63% 0.1 248.4)
-
Step 600
600
#3978AF
oklch(55.7% 0.108 247.5)
-
Step 700
700 (this color)
#255F91
oklch(47.2% 0.101 247.9)
-
Step 800
800
#25527A
oklch(42.7% 0.083 247.9)
-
Step 900
900
#234462
oklch(37.6% 0.065 247.8)
-
Step 950
950
#15283A
oklch(27% 0.042 248.4)
#255F91 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) | #486193 | 0.037 |
| Deuteranopia (no green cones) | #395790 | 0.027 |
| Tritanopia (no blue cones) | #006B71 | 0.074 |
| Achromatopsia (no color) | #5C5C5C | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255F91
#255F91
oklch(47.2% 0.101 247.9)
- #804F07
#804F07
oklch(47.3% 0.101 68.1)
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 #255F91, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy Blue #2E5A88 ΔE 0.019
- Denim Blue #3B5B92 ΔE 0.022
- Peacock Blue #016795 ΔE 0.025
- Denim #3B638C ΔE 0.027
- Dusk Blue #26538D ΔE 0.035
- Dusky Blue #475F94 ΔE 0.035
- Deep Sea Blue #015482 ΔE 0.046
- YInMn Blue #415A77 ΔE 0.047
Use #255F91 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.