#255B8A
Closest named color: Light Navy Blue (#2E5A88). oklch(45.8% 0.096 248), rgb(37, 91, 138).
Aa
White text reads best on this color (7.13:1).
About this color
#255B8A is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.096 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy Blue (#2E5A88), ΔE 0.008 away. White text reads best on it, at 7.13:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Light Navy Blue (#2E5A88) |
| Black text | 2.94:1 |
| White text | 7.13:1 |
Values
| HEX | #255B8A |
| RGB | rgb(37, 91, 138) |
| HSL | hsl(208, 58%, 34%) |
| OKLCH | oklch(45.8% 0.096 248) |
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 #255B8A | 7.13:1 | AAA | Lc -89.4 | Fine for body text |
| Black text on #255B8A | 2.94:1 | Fails | Lc 19.5 | Dividers and decoration only |
| #255B8A text on white | 7.13:1 | AAA | Lc 84.5 | Fine for body text |
| #255B8A text on black | 2.94:1 | Fails | Lc -17.5 | 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
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#CADBED
oklch(88.4% 0.031 249.7)
-
Step 300
300
#A5C5E4
oklch(81% 0.056 247.7)
-
Step 400
400
#73A6D6
oklch(70.8% 0.089 247.7)
-
Step 500
500
#4C8FCB
oklch(63.2% 0.114 247.7)
-
Step 600
600
#2B78B8
oklch(55.7% 0.124 247.6)
-
Step 700
700
#1D649E
oklch(49% 0.115 248)
-
Step 800
800 (this color)
#255B8A
oklch(45.8% 0.096 248)
-
Step 900
900
#1D4467
oklch(37.6% 0.075 248.2)
-
Step 950
950
#12283C
oklch(26.9% 0.047 247.8)
#255B8A 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) | #465D8C | 0.036 |
| Deuteranopia (no green cones) | #385489 | 0.025 |
| Tritanopia (no blue cones) | #00666C | 0.070 |
| Achromatopsia (no color) | #585858 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255B8A
#255B8A
oklch(45.8% 0.096 248)
- #7A4C0B
#7A4C0B
oklch(45.9% 0.096 68.2)
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 #255B8A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy Blue #2E5A88 ΔE 0.008
- Dusk Blue #26538D ΔE 0.025
- Denim Blue #3B5B92 ΔE 0.026
- Deep Sea Blue #015482 ΔE 0.033
- Denim #3B638C ΔE 0.034
- Peacock Blue #016795 ΔE 0.036
- Light Navy #155084 ΔE 0.037
- YInMn Blue #415A77 ΔE 0.040
Use #255B8A 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.