#25357C
Closest named color: Twilight Blue (#0A437A). oklch(36% 0.122 269.7), rgb(37, 53, 124).
Aa
White text reads best on this color (11.17:1).
About this color
#25357C is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.122 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.042 away. White text reads best on it, at 11.17:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.87:1 |
| White text | 11.17:1 |
Values
| HEX | #25357C |
| RGB | rgb(37, 53, 124) |
| HSL | hsl(229, 54%, 32%) |
| OKLCH | oklch(36% 0.122 269.7) |
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 #25357C | 11.17:1 | AAA | Lc -99.3 | Preferred for body text |
| Black text on #25357C | 1.87:1 | Fails | Lc 8.4 | Not readable |
| #25357C text on white | 11.17:1 | AAA | Lc 95.5 | Preferred for body text |
| #25357C text on black | 1.87:1 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3EAFC
oklch(93.7% 0.025 268.8)
-
Step 200
200
#CCD8FC
oklch(88.5% 0.051 270.8)
-
Step 300
300
#A9BEFD
oklch(80.8% 0.092 270)
-
Step 400
400
#7D9AFB
oklch(70.7% 0.146 269.8)
-
Step 500
500
#5E7DF9
oklch(63% 0.188 269.8)
-
Step 600
600
#4763E8
oklch(55.7% 0.203 269.6)
-
Step 700
700
#3951CA
oklch(49.2% 0.189 269.5)
-
Step 800
800
#2F43A3
oklch(42.7% 0.156 269.6)
-
Step 900
900 (this color)
#25357C
oklch(36% 0.122 269.7)
-
Step 950
950
#18234C
oklch(27.1% 0.077 269.4)
#25357C 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) | #003F7E | 0.034 |
| Deuteranopia (no green cones) | #00377B | 0.028 |
| Tritanopia (no blue cones) | #004653 | 0.099 |
| Achromatopsia (no color) | #3B3B3B | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25357C
#25357C
oklch(36% 0.122 269.7)
- #4C3B00
#4C3B00
oklch(36.1% 0.074 90.5)
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 #25357C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.042
- Marine Blue #01386A ΔE 0.044
- Cobalt #1E488F ΔE 0.058
- Marine #042E60 ΔE 0.063
- Dark Slate Blue #483D8B ΔE 0.065
- Prussian Blue #1D3557 ΔE 0.066
- Blueberry #464196 ΔE 0.075
- Midnight Blue #191970 ΔE 0.075
Use #25357C 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.