#252D78
Closest named color: Marine Blue (#01386A). oklch(34% 0.127 273), rgb(37, 45, 120).
Aa
White text reads best on this color (12.17:1).
About this color
#252D78 is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.127 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.048 away. White text reads best on it, at 12.17:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.72:1 |
| White text | 12.17:1 |
Values
| HEX | #252D78 |
| RGB | rgb(37, 45, 120) |
| HSL | hsl(234, 53%, 31%) |
| OKLCH | oklch(34% 0.127 273) |
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 #252D78 | 12.17:1 | AAA | Lc -100.9 | Preferred for body text |
| Black text on #252D78 | 1.72:1 | Fails | Lc 0.0 | Not readable |
| #252D78 text on white | 12.17:1 | AAA | Lc 97.4 | Preferred for body text |
| #252D78 text on black | 1.72:1 | 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
#E3E9FD
oklch(93.5% 0.028 272.5)
-
Step 200
200
#CDD8FD
oklch(88.6% 0.052 272.2)
-
Step 300
300
#ACBDFF
oklch(80.9% 0.095 273)
-
Step 400
400
#8298FF
oklch(70.8% 0.152 272.8)
-
Step 500
500
#667AFD
oklch(63.2% 0.194 273)
-
Step 600
600
#505EEC
oklch(55.6% 0.212 273.1)
-
Step 700
700
#414CCD
oklch(49% 0.197 272.9)
-
Step 800
800
#3540A6
oklch(42.7% 0.163 272.7)
-
Step 900
900 (this color)
#252D78
oklch(34% 0.127 273)
-
Step 950
950
#1A214D
oklch(26.9% 0.081 272.9)
#252D78 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) | #00397A | 0.039 |
| Deuteranopia (no green cones) | #003277 | 0.032 |
| Tritanopia (no blue cones) | #00404E | 0.104 |
| Achromatopsia (no color) | #363636 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #252D78
#252D78
oklch(34% 0.127 273)
- #443600
#443600
oklch(33.8% 0.069 92.7)
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 #252D78, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.048
- Marine #042E60 ΔE 0.054
- Midnight Blue #191970 ΔE 0.055
- Twilight Blue #0A437A ΔE 0.061
- Prussian Blue #1D3557 ΔE 0.065
- Royal #0C1793 ΔE 0.070
- Cobalt #1E488F ΔE 0.079
- Dark Slate Blue #483D8B ΔE 0.080
Use #252D78 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.