#25306B
Closest named color: Marine Blue (#01386A). oklch(33.5% 0.103 271.8), rgb(37, 48, 107).
Aa
White text reads best on this color (12.25:1).
About this color
#25306B is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.103 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.035 away. White text reads best on it, at 12.25:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.71:1 |
| White text | 12.25:1 |
Values
| HEX | #25306B |
| RGB | rgb(37, 48, 107) |
| HSL | hsl(231, 49%, 28%) |
| OKLCH | oklch(33.5% 0.103 271.8) |
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 #25306B | 12.25:1 | AAA | Lc -101.2 | Preferred for body text |
| Black text on #25306B | 1.71:1 | Fails | Lc 0.0 | Not readable |
| #25306B text on white | 12.25:1 | AAA | Lc 97.7 | Preferred for body text |
| #25306B text on black | 1.71:1 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E4E9F9
oklch(93.5% 0.022 272.1)
-
Step 200
200
#CFD8F6
oklch(88.5% 0.042 272.3)
-
Step 300
300
#AFBEF3
oklch(80.9% 0.077 272.3)
-
Step 400
400
#859BEE
oklch(70.7% 0.124 271.6)
-
Step 500
500
#6980E8
oklch(63.2% 0.158 271.8)
-
Step 600
600
#5267D6
oklch(55.7% 0.171 271.7)
-
Step 700
700
#4355BA
oklch(49.2% 0.16 271.7)
-
Step 800
800
#374696
oklch(42.7% 0.132 271.7)
-
Step 900
900 (this color)
#25306B
oklch(33.5% 0.103 271.8)
-
Step 950
950
#1B2346
oklch(26.9% 0.066 271.6)
#25306B 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) | #0C386D | 0.030 |
| Deuteranopia (no green cones) | #00326A | 0.032 |
| Tritanopia (no blue cones) | #003E48 | 0.089 |
| Achromatopsia (no color) | #353535 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25306B
#25306B
oklch(33.5% 0.103 271.8)
- #443500
#443500
oklch(33.6% 0.069 91.2)
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 #25306B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.035
- Marine #042E60 ΔE 0.040
- Prussian Blue #1D3557 ΔE 0.042
- Twilight Blue #0A437A ΔE 0.058
- Midnight Blue #191970 ΔE 0.062
- Dark Blue Grey #1F3B4D ΔE 0.069
- Space Cadet #2B2D42 ΔE 0.072
- Midnight Green #073B4C ΔE 0.076
Use #25306B 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.