#252F66
Closest named color: Marine (#042E60). oklch(32.9% 0.097 272.3), rgb(37, 47, 102).
Aa
White text reads best on this color (12.52:1).
About this color
#252F66 is a dark, moderately saturated blue. In OKLCH its lightness is 33%, its chroma 0.097 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Marine (#042E60), ΔE 0.035 away. White text reads best on it, at 12.52:1.
| Hue family | Blues |
| Lightness | dark (33%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Marine (#042E60) |
| Black text | 1.67:1 |
| White text | 12.52:1 |
Values
| HEX | #252F66 |
| RGB | rgb(37, 47, 102) |
| HSL | hsl(231, 47%, 27%) |
| OKLCH | oklch(32.9% 0.097 272.3) |
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 #252F66 | 12.52:1 | AAA | Lc -101.6 | Preferred for body text |
| Black text on #252F66 | 1.67:1 | Fails | Lc 0.0 | Not readable |
| #252F66 text on white | 12.52:1 | AAA | Lc 98.2 | Preferred for body text |
| #252F66 text on black | 1.67:1 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F8
oklch(93.5% 0.021 274)
-
Step 200
200
#D0D8F5
oklch(88.5% 0.041 273.3)
-
Step 300
300
#B0BEF0
oklch(80.8% 0.073 272.5)
-
Step 400
400
#889BE9
oklch(70.6% 0.116 272.7)
-
Step 500
500
#6B81E2
oklch(63.1% 0.148 271.9)
-
Step 600
600
#5568D0
oklch(55.6% 0.161 272.4)
-
Step 700
700
#4556B4
oklch(49.1% 0.149 272.1)
-
Step 800
800
#394792
oklch(42.8% 0.124 272.2)
-
Step 900
900 (this color)
#252F66
oklch(32.9% 0.097 272.3)
-
Step 950
950
#1C2444
oklch(27.1% 0.06 271.3)
#252F66 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) | #113768 | 0.028 |
| Deuteranopia (no green cones) | #033165 | 0.031 |
| Tritanopia (no blue cones) | #003C45 | 0.085 |
| Achromatopsia (no color) | #343434 | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #252F66
#252F66
oklch(32.9% 0.097 272.3)
- #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 #252F66, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine #042E60 ΔE 0.035
- Prussian Blue #1D3557 ΔE 0.036
- Marine Blue #01386A ΔE 0.036
- Midnight Blue #191970 ΔE 0.062
- Twilight Blue #0A437A ΔE 0.063
- Space Cadet #2B2D42 ΔE 0.064
- Dark Blue Grey #1F3B4D ΔE 0.064
- Gunmetal #293241 ΔE 0.069
Use #252F66 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.