#25305D
Closest named color: Prussian Blue (#1D3557). oklch(32.5% 0.081 271), rgb(37, 48, 93).
Aa
White text reads best on this color (12.65:1).
About this color
#25305D is a dark, moderately saturated blue. In OKLCH its lightness is 32%, its chroma 0.081 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.022 away. White text reads best on it, at 12.65:1.
| Hue family | Blues |
| Lightness | dark (32%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.65:1 |
| White text | 12.65:1 |
Values
| HEX | #25305D |
| RGB | rgb(37, 48, 93) |
| HSL | hsl(228, 43%, 25%) |
| OKLCH | oklch(32.5% 0.081 271) |
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 #25305D | 12.65:1 | AAA | Lc -101.9 | Preferred for body text |
| Black text on #25305D | 1.65:1 | Fails | Lc 0.0 | Not readable |
| #25305D text on white | 12.65:1 | AAA | Lc 98.5 | Preferred for body text |
| #25305D text on black | 1.65:1 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF6
oklch(93.7% 0.017 267.8)
-
Step 200
200
#D1D8F0
oklch(88.4% 0.034 272.8)
-
Step 300
300
#B2BFE9
oklch(80.9% 0.061 271.5)
-
Step 400
400
#8A9DDE
oklch(70.7% 0.098 271.2)
-
Step 500
500
#6E84D4
oklch(63.1% 0.123 270.9)
-
Step 600
600
#576CC2
oklch(55.6% 0.135 271.1)
-
Step 700
700
#475AA7
oklch(49.1% 0.125 270.8)
-
Step 800
800
#3A4A87
oklch(42.7% 0.103 270.5)
-
Step 900
900 (this color)
#25305D
oklch(32.5% 0.081 271)
-
Step 950
950
#1D253F
oklch(27.1% 0.05 269.9)
#25305D 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) | #1C355F | 0.017 |
| Deuteranopia (no green cones) | #15315C | 0.019 |
| Tritanopia (no blue cones) | #053A42 | 0.072 |
| Achromatopsia (no color) | #333333 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25305D
#25305D
oklch(32.5% 0.081 271)
- #413200
#413200
oklch(32.5% 0.066 90.4)
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 #25305D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.022
- Marine #042E60 ΔE 0.034
- Marine Blue #01386A ΔE 0.039
- Space Cadet #2B2D42 ΔE 0.048
- Dark Blue Grey #1F3B4D ΔE 0.051
- Gunmetal #293241 ΔE 0.053
- Midnight Green #073B4C ΔE 0.058
- Oxford Blue #1B263B ΔE 0.068
Use #25305D 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.