#252F5B
Closest named color: Prussian Blue (#1D3557). oklch(32.1% 0.079 271.7), rgb(37, 47, 91).
Aa
White text reads best on this color (12.83:1).
About this color
#252F5B is a dark, moderately saturated blue. In OKLCH its lightness is 32%, its chroma 0.079 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.023 away. White text reads best on it, at 12.83:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.63:1 |
| White text | 12.83:1 |
Values
| HEX | #252F5B |
| RGB | rgb(37, 47, 91) |
| HSL | hsl(229, 42%, 25%) |
| OKLCH | oklch(32.1% 0.079 271.7) |
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 #252F5B | 12.83:1 | AAA | Lc -102.2 | Preferred for body text |
| Black text on #252F5B | 1.63:1 | Fails | Lc 0.0 | Not readable |
| #252F5B text on white | 12.83:1 | AAA | Lc 98.8 | Preferred for body text |
| #252F5B text on black | 1.63:1 | 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 950.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FD
oklch(93.5% 0.028 272.5)
-
Step 200
200
#CCD8FD
oklch(88.5% 0.053 271.1)
-
Step 300
300
#ABBDFE
oklch(80.8% 0.094 272.2)
-
Step 400
400
#8099FD
oklch(70.8% 0.149 271.5)
-
Step 500
500
#637BFB
oklch(63.1% 0.191 271.8)
-
Step 600
600
#4C60EB
oklch(55.6% 0.209 271.5)
-
Step 700
700
#3E4ECC
oklch(49.1% 0.194 271.6)
-
Step 800
800
#3341A5
oklch(42.7% 0.161 271.7)
-
Step 900
900
#2C3983
oklch(37.9% 0.125 271.6)
-
Step 950
950 (this color)
#252F5B
oklch(32.1% 0.079 271.7)
#252F5B 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) | #1C345D | 0.017 |
| Deuteranopia (no green cones) | #15305A | 0.020 |
| Tritanopia (no blue cones) | #083940 | 0.071 |
| Achromatopsia (no color) | #323232 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #252F5B
#252F5B
oklch(32.1% 0.079 271.7)
- #3F3100
#3F3100
oklch(32% 0.065 91.4)
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 #252F5B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.023
- Marine #042E60 ΔE 0.034
- Marine Blue #01386A ΔE 0.042
- Space Cadet #2B2D42 ΔE 0.045
- Gunmetal #293241 ΔE 0.051
- Dark Blue Grey #1F3B4D ΔE 0.051
- Midnight Green #073B4C ΔE 0.058
- Oxford Blue #1B263B ΔE 0.064
Use #252F5B 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.