#252B59
Closest named color: Prussian Blue (#1D3557). oklch(31% 0.082 275), rgb(37, 43, 89).
Aa
White text reads best on this color (13.38:1).
About this color
#252B59 is a dark, moderately saturated blue. In OKLCH its lightness is 31%, its chroma 0.082 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.032 away. White text reads best on it, at 13.38:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.56:1 |
| White text | 13.38:1 |
Values
| HEX | #252B59 |
| RGB | rgb(37, 43, 89) |
| HSL | hsl(233, 41%, 25%) |
| OKLCH | oklch(31% 0.082 275) |
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 #252B59 | 13.38:1 | AAA | Lc -102.9 | Preferred for body text |
| Black text on #252B59 | 1.56:1 | Fails | Lc 0.0 | Not readable |
| #252B59 text on white | 13.38:1 | AAA | Lc 99.7 | Preferred for body text |
| #252B59 text on black | 1.56:1 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E4E9FD
oklch(93.6% 0.028 274.7)
-
Step 200
200
#CED7FE
oklch(88.5% 0.055 275)
-
Step 300
300
#AEBCFF
oklch(80.9% 0.096 274.9)
-
Step 400
400
#8696FF
oklch(70.7% 0.154 275.2)
-
Step 500
500
#6A77FF
oklch(63% 0.2 275)
-
Step 600
600
#555BEE
oklch(55.5% 0.217 275)
-
Step 700
700
#464ACF
oklch(49.1% 0.2 274.9)
-
Step 800
800
#393EA7
oklch(42.7% 0.165 274.8)
-
Step 900
900
#303684
oklch(37.6% 0.129 275)
-
Step 950
950 (this color)
#252B59
oklch(31% 0.082 275)
#252B59 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) | #16315B | 0.024 |
| Deuteranopia (no green cones) | #0F2D58 | 0.027 |
| Tritanopia (no blue cones) | #0C353D | 0.073 |
| Achromatopsia (no color) | #2F2F2F | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #252B59
#252B59
oklch(31% 0.082 275)
- #3A2F00
#3A2F00
oklch(30.8% 0.063 94.9)
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 #252B59, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.032
- Marine #042E60 ΔE 0.034
- Space Cadet #2B2D42 ΔE 0.045
- Marine Blue #01386A ΔE 0.050
- Gunmetal #293241 ΔE 0.054
- Oxford Blue #1B263B ΔE 0.058
- Dark Blue Grey #1F3B4D ΔE 0.060
- Midnight Green #073B4C ΔE 0.065
Use #252B59 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.