#252A71
Closest named color: Marine (#042E60). oklch(32.8% 0.121 274.5), rgb(37, 42, 113).
Aa
White text reads best on this color (12.74:1).
About this color
#252A71 is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.121 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.046 away. White text reads best on it, at 12.74:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.64:1 |
| White text | 12.74:1 |
Values
| HEX | #252A71 |
| RGB | rgb(37, 42, 113) |
| HSL | hsl(236, 51%, 29%) |
| OKLCH | oklch(32.8% 0.121 274.5) |
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 #252A71 | 12.74:1 | AAA | Lc -101.8 | Preferred for body text |
| Black text on #252A71 | 1.64:1 | Fails | Lc 0.0 | Not readable |
| #252A71 text on white | 12.74:1 | AAA | Lc 98.4 | Preferred for body text |
| #252A71 text on black | 1.64:1 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E4E9FC
oklch(93.6% 0.026 274.1)
-
Step 200
200
#CFD7FB
oklch(88.5% 0.05 275.4)
-
Step 300
300
#AFBDFC
oklch(81% 0.091 274.5)
-
Step 400
400
#8698FA
oklch(70.8% 0.144 274.3)
-
Step 500
500
#6B7AF7
oklch(63.1% 0.185 274.7)
-
Step 600
600
#555FE6
oklch(55.6% 0.202 274.5)
-
Step 700
700
#464DC8
oklch(49% 0.188 274.6)
-
Step 800
800
#3940A2
oklch(42.6% 0.156 274.5)
-
Step 900
900 (this color)
#252A71
oklch(32.8% 0.121 274.5)
-
Step 950
950
#1C214B
oklch(26.9% 0.077 274.9)
#252A71 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) | #003673 | 0.041 |
| Deuteranopia (no green cones) | #002F70 | 0.034 |
| Tritanopia (no blue cones) | #003C49 | 0.101 |
| Achromatopsia (no color) | #323232 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #252A71
#252A71
oklch(32.8% 0.121 274.5)
- #403400
#403400
oklch(32.8% 0.067 94.7)
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 #252A71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.046
- Midnight Blue #191970 ΔE 0.046
- Marine Blue #01386A ΔE 0.048
- Prussian Blue #1D3557 ΔE 0.059
- Twilight Blue #0A437A ΔE 0.070
- Royal #0C1793 ΔE 0.075
- Space Cadet #2B2D42 ΔE 0.086
- Dark Blue Grey #1F3B4D ΔE 0.088
Use #252A71 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.