#255F7B
Closest named color: YInMn Blue (#415A77). oklch(46% 0.075 232.7), rgb(37, 95, 123).
Aa
White text reads best on this color (6.99:1).
About this color
#255F7B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.075 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.029 away. White text reads best on it, at 6.99:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 3.00:1 |
| White text | 6.99:1 |
Values
| HEX | #255F7B |
| RGB | rgb(37, 95, 123) |
| HSL | hsl(200, 54%, 31%) |
| OKLCH | oklch(46% 0.075 232.7) |
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 #255F7B | 6.99:1 | AA | Lc -89.0 | Fine for body text |
| Black text on #255F7B | 3.00:1 | AA large text | Lc 20.0 | Dividers and decoration only |
| #255F7B text on white | 6.99:1 | AA | Lc 84.0 | Fine for body text |
| #255F7B text on black | 3.00:1 | AA large text | Lc -18.0 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBF0
oklch(93.5% 0.011 234.8)
-
Step 200
200
#CDDCE4
oklch(88.6% 0.02 230.7)
-
Step 300
300
#AAC5D4
oklch(80.8% 0.036 232.2)
-
Step 400
400
#7CA7BF
oklch(70.6% 0.058 233.1)
-
Step 500
500
#5991AF
oklch(63% 0.074 233.1)
-
Step 600
600
#3D7B9B
oklch(55.5% 0.081 233.3)
-
Step 700
700 (this color)
#255F7B
oklch(46% 0.075 232.7)
-
Step 800
800
#28556B
oklch(42.8% 0.061 231.9)
-
Step 900
900
#254657
oklch(37.7% 0.048 232.5)
-
Step 950
950
#162933
oklch(26.9% 0.031 232.5)
#255F7B 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) | #515E7C | 0.049 |
| Deuteranopia (no green cones) | #45557B | 0.042 |
| Tritanopia (no blue cones) | #006768 | 0.049 |
| Achromatopsia (no color) | #595959 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #255F7B
#255F7B
oklch(46% 0.075 232.7)
- #794C2E
#794C2E
oklch(46.1% 0.075 53.5)
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 #255F7B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.029
- Light Navy Blue #2E5A88 ΔE 0.031
- Petrol #005F6A ΔE 0.036
- Denim #3B638C ΔE 0.037
- Peacock Blue #016795 ΔE 0.043
- Deep Sea Blue #015482 ΔE 0.045
- Denim Blue #3B5B92 ΔE 0.049
- Dark Aqua #05696B ΔE 0.049
Use #255F7B 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.