#252D73
Closest named color: Marine Blue (#01386A). oklch(33.6% 0.12 273.2), rgb(37, 45, 115).
Aa
White text reads best on this color (12.34:1).
About this color
#252D73 is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.120 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.044 away. White text reads best on it, at 12.34:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.70:1 |
| White text | 12.34:1 |
Values
| HEX | #252D73 |
| RGB | rgb(37, 45, 115) |
| HSL | hsl(234, 51%, 30%) |
| OKLCH | oklch(33.6% 0.12 273.2) |
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 #252D73 | 12.34:1 | AAA | Lc -101.2 | Preferred for body text |
| Black text on #252D73 | 1.70:1 | Fails | Lc 0.0 | Not readable |
| #252D73 text on white | 12.34:1 | AAA | Lc 97.7 | Preferred for body text |
| #252D73 text on black | 1.70:1 | 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 900.
-
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
#CED8FB
oklch(88.6% 0.049 272.8)
-
Step 300
300
#ADBDFB
oklch(80.8% 0.09 273.1)
-
Step 400
400
#8498F9
oklch(70.6% 0.144 273.4)
-
Step 500
500
#687BF6
oklch(63% 0.183 273.4)
-
Step 600
600
#5261E5
oklch(55.7% 0.199 273.2)
-
Step 700
700
#434FC7
oklch(49.1% 0.185 273.1)
-
Step 800
800
#3741A1
oklch(42.6% 0.154 273.4)
-
Step 900
900 (this color)
#252D73
oklch(33.6% 0.12 273.2)
-
Step 950
950
#1B224B
oklch(27% 0.076 273)
#252D73 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) | #003875 | 0.038 |
| Deuteranopia (no green cones) | #003172 | 0.033 |
| Tritanopia (no blue cones) | #003E4B | 0.099 |
| Achromatopsia (no color) | #353535 | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #252D73
#252D73
oklch(33.6% 0.12 273.2)
- #433500
#433500
oklch(33.5% 0.068 92.5)
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 #252D73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.044
- Marine #042E60 ΔE 0.048
- Midnight Blue #191970 ΔE 0.053
- Prussian Blue #1D3557 ΔE 0.058
- Twilight Blue #0A437A ΔE 0.062
- Royal #0C1793 ΔE 0.076
- Cobalt #1E488F ΔE 0.083
- Dark Slate Blue #483D8B ΔE 0.083
Use #252D73 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.