#252F59
Closest named color: Prussian Blue (#1D3557). oklch(31.9% 0.076 271.4), rgb(37, 47, 89).
Aa
White text reads best on this color (12.88:1).
About this color
#252F59 is a dark, moderately saturated blue. In OKLCH its lightness is 32%, its chroma 0.076 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.021 away. White text reads best on it, at 12.88:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.62:1 |
| White text | 12.88:1 |
Values
| HEX | #252F59 |
| RGB | rgb(37, 47, 89) |
| HSL | hsl(228, 41%, 25%) |
| OKLCH | oklch(31.9% 0.076 271.4) |
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 #252F59 | 12.88:1 | AAA | Lc -102.2 | Preferred for body text |
| Black text on #252F59 | 1.62:1 | Fails | Lc 0.0 | Not readable |
| #252F59 text on white | 12.88:1 | AAA | Lc 98.9 | Preferred for body text |
| #252F59 text on black | 1.62:1 | 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
#E3E9FC
oklch(93.5% 0.027 271.9)
-
Step 200
200
#CDD8FB
oklch(88.5% 0.05 271.6)
-
Step 300
300
#ABBEFB
oklch(80.9% 0.089 270.9)
-
Step 400
400
#8199FA
oklch(70.7% 0.144 271.8)
-
Step 500
500
#637DF7
oklch(63.2% 0.183 271.2)
-
Step 600
600
#4D62E6
oklch(55.6% 0.2 271.5)
-
Step 700
700
#3F50C8
oklch(49.2% 0.186 271.6)
-
Step 800
800
#3342A1
oklch(42.6% 0.154 271.4)
-
Step 900
900
#2C3980
oklch(37.6% 0.12 271.6)
-
Step 950
950 (this color)
#252F59
oklch(31.9% 0.076 271.4)
#252F59 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) | #1D345B | 0.017 |
| Deuteranopia (no green cones) | #173058 | 0.018 |
| Tritanopia (no blue cones) | #0A383F | 0.068 |
| Achromatopsia (no color) | #323232 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #252F59
#252F59
oklch(31.9% 0.076 271.4)
- #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 #252F59, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.021
- Marine #042E60 ΔE 0.035
- Space Cadet #2B2D42 ΔE 0.041
- Marine Blue #01386A ΔE 0.044
- Gunmetal #293241 ΔE 0.047
- Dark Blue Grey #1F3B4D ΔE 0.049
- Midnight Green #073B4C ΔE 0.055
- Oxford Blue #1B263B ΔE 0.061
Use #252F59 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.