#255181
Closest named color: Light Navy (#155084). oklch(42.8% 0.094 252.6), rgb(37, 81, 129).
Aa
White text reads best on this color (8.16:1).
About this color
#255181 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.094 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.013 away. White text reads best on it, at 8.16:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.57:1 |
| White text | 8.16:1 |
Values
| HEX | #255181 |
| RGB | rgb(37, 81, 129) |
| HSL | hsl(211, 55%, 33%) |
| OKLCH | oklch(42.8% 0.094 252.6) |
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 #255181 | 8.16:1 | AAA | Lc -92.6 | Preferred for body text |
| Black text on #255181 | 2.57:1 | Fails | Lc 16.0 | Dividers and decoration only |
| #255181 text on white | 8.16:1 | AAA | Lc 88.0 | Fine for body text |
| #255181 text on black | 2.57:1 | Fails | Lc -14.2 | Not readable |
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
#E3EBF4
oklch(93.7% 0.015 251.2)
-
Step 200
200
#CBDBED
oklch(88.5% 0.03 251.3)
-
Step 300
300
#A8C3E4
oklch(80.8% 0.055 253.6)
-
Step 400
400
#79A4D6
oklch(70.7% 0.087 252.7)
-
Step 500
500
#558DCB
oklch(63.2% 0.111 252.2)
-
Step 600
600
#3976B8
oklch(55.7% 0.121 252.4)
-
Step 700
700
#2B629F
oklch(49% 0.114 253.2)
-
Step 800
800 (this color)
#255181
oklch(42.8% 0.094 252.6)
-
Step 900
900
#234367
oklch(37.7% 0.073 252.7)
-
Step 950
950
#15273C
oklch(26.8% 0.046 253.2)
#255181 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) | #3B5483 | 0.027 |
| Deuteranopia (no green cones) | #2E4B80 | 0.018 |
| Tritanopia (no blue cones) | #005C63 | 0.072 |
| Achromatopsia (no color) | #4F4F4F | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255181
#255181
oklch(42.8% 0.094 252.6)
- #6D4600
#6D4600
oklch(42.8% 0.091 73.1)
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 #255181, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.013
- Deep Sea Blue #015482 ΔE 0.019
- Dusk Blue #26538D ΔE 0.020
- Light Navy Blue #2E5A88 ΔE 0.030
- Cobalt #1E488F ΔE 0.039
- Denim Blue #3B5B92 ΔE 0.047
- YInMn Blue #415A77 ΔE 0.049
- Twilight Blue #0A437A ΔE 0.050
Use #255181 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.