#255B8F
Closest named color: Light Navy Blue (#2E5A88). oklch(46.1% 0.102 250.3), rgb(37, 91, 143).
Aa
White text reads best on this color (7.06:1).
About this color
#255B8F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.102 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy Blue (#2E5A88), ΔE 0.013 away. White text reads best on it, at 7.06:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.102) |
| Temperature | cool |
| Nearest name | Light Navy Blue (#2E5A88) |
| Black text | 2.97:1 |
| White text | 7.06:1 |
Values
| HEX | #255B8F |
| RGB | rgb(37, 91, 143) |
| HSL | hsl(209, 59%, 35%) |
| OKLCH | oklch(46.1% 0.102 250.3) |
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 #255B8F | 7.06:1 | AAA | Lc -89.2 | Fine for body text |
| Black text on #255B8F | 2.97:1 | Fails | Lc 19.8 | Dividers and decoration only |
| #255B8F text on white | 7.06:1 | AAA | Lc 84.2 | Fine for body text |
| #255B8F text on black | 2.97:1 | Fails | Lc -17.8 | 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
#7BA5D1
oklch(70.8% 0.079 250.1)
-
Step 500
500
#588DC4
oklch(63% 0.101 250.5)
-
Step 600
600
#3C77B1
oklch(55.7% 0.11 250.1)
-
Step 700
700 (this color)
#255B8F
oklch(46.1% 0.102 250.3)
-
Step 800
800
#27517B
oklch(42.6% 0.085 250.5)
-
Step 900
900
#254463
oklch(37.8% 0.065 249.9)
-
Step 950
950
#16283A
oklch(27.1% 0.041 249.6)
#255B8F 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) | #435E91 | 0.033 |
| Deuteranopia (no green cones) | #34548E | 0.022 |
| Tritanopia (no blue cones) | #00676E | 0.076 |
| Achromatopsia (no color) | #585858 | 0.102 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255B8F
#255B8F
oklch(46.1% 0.102 250.3)
- #7B4D00
#7B4D00
oklch(46.2% 0.1 70.5)
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 #255B8F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy Blue #2E5A88 ΔE 0.013
- Denim Blue #3B5B92 ΔE 0.022
- Dusk Blue #26538D ΔE 0.023
- Denim #3B638C ΔE 0.035
- Peacock Blue #016795 ΔE 0.035
- Deep Sea Blue #015482 ΔE 0.036
- Light Navy #155084 ΔE 0.039
- Dusky Blue #475F94 ΔE 0.040
Use #255B8F 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.