#252F76
Closest named color: Marine Blue (#01386A). oklch(34.2% 0.121 272.3), rgb(37, 47, 118).
Aa
White text reads best on this color (12.02:1).
About this color
#252F76 is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.121 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.043 away. White text reads best on it, at 12.02:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.74:1 |
| White text | 12.02:1 |
Values
| HEX | #252F76 |
| RGB | rgb(37, 47, 118) |
| HSL | hsl(233, 52%, 30%) |
| OKLCH | oklch(34.2% 0.121 272.3) |
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 #252F76 | 12.02:1 | AAA | Lc -100.7 | Preferred for body text |
| Black text on #252F76 | 1.74:1 | Fails | Lc 0.0 | Not readable |
| #252F76 text on white | 12.02:1 | AAA | Lc 97.1 | Preferred for body text |
| #252F76 text on black | 1.74:1 | Fails | Lc 0.0 | 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 900.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FC
oklch(93.5% 0.027 271.9)
-
Step 200
200
#CDD8FB
oklch(88.5% 0.05 271.6)
-
Step 300
300
#ACBDFC
oklch(80.8% 0.091 272.6)
-
Step 400
400
#8299FB
oklch(70.8% 0.146 272.2)
-
Step 500
500
#657CF8
oklch(63.2% 0.186 272.1)
-
Step 600
600
#4F61E7
oklch(55.6% 0.202 272.2)
-
Step 700
700
#404FC9
oklch(49.1% 0.188 272.1)
-
Step 800
800
#3542A2
oklch(42.8% 0.155 272.3)
-
Step 900
900 (this color)
#252F76
oklch(34.2% 0.121 272.3)
-
Step 950
950
#1A224B
oklch(27% 0.076 272.1)
#252F76 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) | #003A78 | 0.037 |
| Deuteranopia (no green cones) | #003375 | 0.031 |
| Tritanopia (no blue cones) | #00404D | 0.100 |
| Achromatopsia (no color) | #363636 | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #252F76
#252F76
oklch(34.2% 0.121 272.3)
- #453700
#453700
oklch(34.2% 0.07 93)
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 #252F76, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.043
- Marine #042E60 ΔE 0.052
- Twilight Blue #0A437A ΔE 0.056
- Midnight Blue #191970 ΔE 0.059
- Prussian Blue #1D3557 ΔE 0.060
- Royal #0C1793 ΔE 0.075
- Cobalt #1E488F ΔE 0.076
- Dark Slate Blue #483D8B ΔE 0.078
Use #252F76 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.