#25375B
Closest named color: Prussian Blue (#1D3557). oklch(34% 0.068 263.1), rgb(37, 55, 91).
Aa
White text reads best on this color (11.82:1).
About this color
#25375B is a dark, muted blue. In OKLCH its lightness is 34%, its chroma 0.068 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.014 away. White text reads best on it, at 11.82:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.77:1 |
| White text | 11.82:1 |
Values
| HEX | #25375B |
| RGB | rgb(37, 55, 91) |
| HSL | hsl(220, 42%, 25%) |
| OKLCH | oklch(34% 0.068 263.1) |
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 #25375B | 11.82:1 | AAA | Lc -100.6 | Preferred for body text |
| Black text on #25375B | 1.77:1 | Fails | Lc 0.0 | Not readable |
| #25375B text on white | 11.82:1 | AAA | Lc 97.0 | Preferred for body text |
| #25375B text on black | 1.77:1 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF4
oklch(93.6% 0.015 264.5)
-
Step 200
200
#CFDAEC
oklch(88.5% 0.028 260.3)
-
Step 300
300
#B0C1E2
oklch(80.9% 0.05 263.7)
-
Step 400
400
#86A1D4
oklch(70.8% 0.081 262.8)
-
Step 500
500
#6889C9
oklch(63.2% 0.104 262.9)
-
Step 600
600
#5071B5
oklch(55.5% 0.113 263.5)
-
Step 700
700
#405F9C
oklch(49.1% 0.105 262.8)
-
Step 800
800
#354E7F
oklch(42.8% 0.087 262.8)
-
Step 900
900 (this color)
#25375B
oklch(34% 0.068 263.1)
-
Step 950
950
#1B263C
oklch(27% 0.044 263.4)
#25375B 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) | #283A5C | 0.011 |
| Deuteranopia (no green cones) | #22355A | 0.008 |
| Tritanopia (no blue cones) | #053F44 | 0.062 |
| Achromatopsia (no color) | #373737 | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25375B
#25375B
oklch(34% 0.068 263.1)
- #493403
#493403
oklch(34% 0.068 82.6)
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 #25375B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.014
- Dark Blue Grey #1F3B4D ΔE 0.032
- Marine Blue #01386A ΔE 0.037
- Midnight Green #073B4C ΔE 0.043
- Gunmetal #293241 ΔE 0.045
- Marine #042E60 ΔE 0.047
- Space Cadet #2B2D42 ΔE 0.048
- Dark Grey Blue #29465B ΔE 0.050
Use #25375B 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.