#25387A
Closest named color: Twilight Blue (#0A437A). oklch(36.5% 0.115 268.2), rgb(37, 56, 122).
Aa
White text reads best on this color (10.90:1).
About this color
#25387A is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.115 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.034 away. White text reads best on it, at 10.90:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.92:1 |
| White text | 10.90:1 |
Values
| HEX | #25387A |
| RGB | rgb(37, 56, 122) |
| HSL | hsl(227, 53%, 31%) |
| OKLCH | oklch(36.5% 0.115 268.2) |
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 #25387A | 10.90:1 | AAA | Lc -98.8 | Preferred for body text |
| Black text on #25387A | 1.92:1 | Fails | Lc 9.0 | Not readable |
| #25387A text on white | 10.90:1 | AAA | Lc 94.9 | Preferred for body text |
| #25387A text on black | 1.92:1 | Fails | Lc -7.7 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CCD9FA
oklch(88.6% 0.048 268.4)
-
Step 300
300
#A9BFF9
oklch(80.9% 0.086 268.4)
-
Step 400
400
#7C9CF6
oklch(70.7% 0.137 268)
-
Step 500
500
#5C80F3
oklch(63.1% 0.177 268)
-
Step 600
600
#4566E1
oklch(55.6% 0.191 268.2)
-
Step 700
700
#3754C4
oklch(49.2% 0.178 268.1)
-
Step 800
800
#2D459E
oklch(42.6% 0.147 268.1)
-
Step 900
900 (this color)
#25387A
oklch(36.5% 0.115 268.2)
-
Step 950
950
#17234A
oklch(26.9% 0.074 268.3)
#25387A 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) | #0E417C | 0.029 |
| Deuteranopia (no green cones) | #003979 | 0.028 |
| Tritanopia (no blue cones) | #004853 | 0.095 |
| Achromatopsia (no color) | #3D3D3D | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25387A
#25387A
oklch(36.5% 0.115 268.2)
- #4F3B00
#4F3B00
oklch(36.4% 0.075 87.1)
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 #25387A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.034
- Marine Blue #01386A ΔE 0.041
- Cobalt #1E488F ΔE 0.053
- Prussian Blue #1D3557 ΔE 0.062
- Dark Slate Blue #483D8B ΔE 0.063
- Marine #042E60 ΔE 0.064
- Light Navy #155084 ΔE 0.068
- Blueberry #464196 ΔE 0.073
Use #25387A 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.