#255771
Closest named color: YInMn Blue (#415A77). oklch(43.5% 0.069 234.1), rgb(37, 87, 113).
Aa
White text reads best on this color (7.83:1).
About this color
#255771 is a dark, muted blue. In OKLCH its lightness is 43%, its chroma 0.069 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.034 away. White text reads best on it, at 7.83:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.68:1 |
| White text | 7.83:1 |
Values
| HEX | #255771 |
| RGB | rgb(37, 87, 113) |
| HSL | hsl(201, 51%, 29%) |
| OKLCH | oklch(43.5% 0.069 234.1) |
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 #255771 | 7.83:1 | AAA | Lc -91.7 | Preferred for body text |
| Black text on #255771 | 2.68:1 | Fails | Lc 17.0 | Dividers and decoration only |
| #255771 text on white | 7.83:1 | AAA | Lc 87.0 | Fine for body text |
| #255771 text on black | 2.68:1 | Fails | Lc -15.1 | 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 800.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBF0
oklch(93.5% 0.011 234.8)
-
Step 200
200
#CCDCE6
oklch(88.5% 0.022 235)
-
Step 300
300
#A8C6D7
oklch(81% 0.04 232.8)
-
Step 400
400
#79A8C3
oklch(70.8% 0.064 234.1)
-
Step 500
500
#5492B4
oklch(63.2% 0.082 234.1)
-
Step 600
600
#367C9F
oklch(55.7% 0.088 233.3)
-
Step 700
700
#286888
oklch(49.1% 0.082 233.8)
-
Step 800
800 (this color)
#255771
oklch(43.5% 0.069 234.1)
-
Step 900
900
#22465A
oklch(37.7% 0.054 235)
-
Step 950
950
#152935
oklch(27% 0.034 236.3)
#255771 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) | #4A5672 | 0.043 |
| Deuteranopia (no green cones) | #404E71 | 0.038 |
| Tritanopia (no blue cones) | #005E60 | 0.046 |
| Achromatopsia (no color) | #525252 | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255771
#255771
oklch(43.5% 0.069 234.1)
- #6E462B
#6E462B
oklch(43.4% 0.068 54)
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 #255771, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.034
- Petrol #005F6A ΔE 0.035
- Deep Sea Blue #015482 ΔE 0.036
- Light Navy Blue #2E5A88 ΔE 0.040
- Light Navy #155084 ΔE 0.044
- Deep Teal #00555A ΔE 0.046
- Dusk Blue #26538D ΔE 0.051
- Dark Slate Gray #2F4F4F ΔE 0.055
Use #255771 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.