#252B71
Closest named color: Marine (#042E60). oklch(33% 0.119 274.1), rgb(37, 43, 113).
Aa
White text reads best on this color (12.63:1).
About this color
#252B71 is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.119 and its hue 274°. 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 12.63:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.66:1 |
| White text | 12.63:1 |
Values
| HEX | #252B71 |
| RGB | rgb(37, 43, 113) |
| HSL | hsl(235, 51%, 29%) |
| OKLCH | oklch(33% 0.119 274.1) |
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 #252B71 | 12.63:1 | AAA | Lc -101.7 | Preferred for body text |
| Black text on #252B71 | 1.66:1 | Fails | Lc 0.0 | Not readable |
| #252B71 text on white | 12.63:1 | AAA | Lc 98.3 | Preferred for body text |
| #252B71 text on black | 1.66:1 | 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
#CED7FB
oklch(88.4% 0.051 274.3)
-
Step 300
300
#AEBDFB
oklch(80.9% 0.089 273.7)
-
Step 400
400
#8698F9
oklch(70.7% 0.143 274.2)
-
Step 500
500
#6A7BF6
oklch(63.2% 0.183 274)
-
Step 600
600
#5460E5
oklch(55.6% 0.199 274)
-
Step 700
700
#454EC7
oklch(49.1% 0.185 274.1)
-
Step 800
800
#3941A1
oklch(42.8% 0.153 274.3)
-
Step 900
900 (this color)
#252B71
oklch(33% 0.119 274.1)
-
Step 950
950
#1C224B
oklch(27.1% 0.076 274)
#252B71 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 | 0.039 |
| Deuteranopia (no green cones) | #003070 | 0.034 |
| Tritanopia (no blue cones) | #003C49 | 0.100 |
| Achromatopsia (no color) | #333333 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #252B71
#252B71
oklch(33% 0.119 274.1)
- #413400
#413400
oklch(33% 0.068 93.5)
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 #252B71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.046
- Marine Blue #01386A ΔE 0.046
- Midnight Blue #191970 ΔE 0.048
- Prussian Blue #1D3557 ΔE 0.058
- Twilight Blue #0A437A ΔE 0.067
- Royal #0C1793 ΔE 0.076
- Space Cadet #2B2D42 ΔE 0.085
- Dark Blue Grey #1F3B4D ΔE 0.086
Use #252B71 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.