#252D5B
Closest named color: Prussian Blue (#1D3557). oklch(31.6% 0.082 273.4), rgb(37, 45, 91).
Aa
White text reads best on this color (13.08:1).
About this color
#252D5B is a dark, moderately saturated blue. In OKLCH its lightness is 32%, its chroma 0.082 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.028 away. White text reads best on it, at 13.08:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.60:1 |
| White text | 13.08:1 |
Values
| HEX | #252D5B |
| RGB | rgb(37, 45, 91) |
| HSL | hsl(231, 42%, 25%) |
| OKLCH | oklch(31.6% 0.082 273.4) |
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 #252D5B | 13.08:1 | AAA | Lc -102.5 | Preferred for body text |
| Black text on #252D5B | 1.60:1 | Fails | Lc 0.0 | Not readable |
| #252D5B text on white | 13.08:1 | AAA | Lc 99.2 | Preferred for body text |
| #252D5B text on black | 1.60:1 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E3E9FD
oklch(93.5% 0.028 272.5)
-
Step 200
200
#CDD7FE
oklch(88.4% 0.055 273.9)
-
Step 300
300
#ACBDFF
oklch(80.9% 0.095 273)
-
Step 400
400
#8397FF
oklch(70.7% 0.153 273.6)
-
Step 500
500
#6679FF
oklch(63.1% 0.198 273.3)
-
Step 600
600
#515DEF
oklch(55.7% 0.216 273.4)
-
Step 700
700
#424BD0
oklch(49.1% 0.202 273.3)
-
Step 800
800
#363FA8
oklch(42.8% 0.166 273.3)
-
Step 900
900
#2E3785
oklch(37.7% 0.13 273.5)
-
Step 950
950 (this color)
#252D5B
oklch(31.6% 0.082 273.4)
#252D5B 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) | #18335D | 0.022 |
| Deuteranopia (no green cones) | #112E5A | 0.024 |
| Tritanopia (no blue cones) | #08373F | 0.073 |
| Achromatopsia (no color) | #313131 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #252D5B
#252D5B
oklch(31.6% 0.082 273.4)
- #3D3100
#3D3100
oklch(31.7% 0.065 94)
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 #252D5B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.028
- Marine #042E60 ΔE 0.033
- Marine Blue #01386A ΔE 0.045
- Space Cadet #2B2D42 ΔE 0.046
- Gunmetal #293241 ΔE 0.054
- Dark Blue Grey #1F3B4D ΔE 0.056
- Midnight Green #073B4C ΔE 0.062
- Oxford Blue #1B263B ΔE 0.063
Use #252D5B 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.