#252C57
Closest named color: Prussian Blue (#1D3557). oklch(31.1% 0.077 274.1), rgb(37, 44, 87).
Aa
White text reads best on this color (13.32:1).
About this color
#252C57 is a dark, moderately saturated blue. In OKLCH its lightness is 31%, its chroma 0.077 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.029 away. White text reads best on it, at 13.32:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.57:1 |
| White text | 13.32:1 |
Values
| HEX | #252C57 |
| RGB | rgb(37, 44, 87) |
| HSL | hsl(232, 40%, 24%) |
| OKLCH | oklch(31.1% 0.077 274.1) |
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 #252C57 | 13.32:1 | AAA | Lc -102.8 | Preferred for body text |
| Black text on #252C57 | 1.57:1 | Fails | Lc 0.0 | Not readable |
| #252C57 text on white | 13.32:1 | AAA | Lc 99.6 | Preferred for body text |
| #252C57 text on black | 1.57:1 | 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
#E4E9FC
oklch(93.6% 0.026 274.1)
-
Step 200
200
#CED7FC
oklch(88.4% 0.052 274.5)
-
Step 300
300
#AEBDFC
oklch(81% 0.091 273.9)
-
Step 400
400
#8598FB
oklch(70.8% 0.146 273.9)
-
Step 500
500
#697AF8
oklch(63% 0.187 274)
-
Step 600
600
#545FE7
oklch(55.6% 0.203 274.2)
-
Step 700
700
#454DC9
oklch(49.1% 0.189 274.2)
-
Step 800
800
#3840A2
oklch(42.6% 0.156 274.1)
-
Step 900
900
#303881
oklch(37.8% 0.122 274.3)
-
Step 950
950 (this color)
#252C57
oklch(31.1% 0.077 274.1)
#252C57 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) | #193259 | 0.022 |
| Deuteranopia (no green cones) | #132D56 | 0.023 |
| Tritanopia (no blue cones) | #0E353D | 0.067 |
| Achromatopsia (no color) | #2F2F2F | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #252C57
#252C57
oklch(31.1% 0.077 274.1)
- #3B2F00
#3B2F00
oklch(31% 0.063 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 #252C57, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.029
- Marine #042E60 ΔE 0.035
- Space Cadet #2B2D42 ΔE 0.040
- Gunmetal #293241 ΔE 0.049
- Marine Blue #01386A ΔE 0.050
- Dark Blue Grey #1F3B4D ΔE 0.055
- Oxford Blue #1B263B ΔE 0.055
- Midnight Green #073B4C ΔE 0.061
Use #252C57 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.