#25477B
Closest named color: Twilight Blue (#0A437A). oklch(40% 0.097 258.7), rgb(37, 71, 123).
Aa
White text reads best on this color (9.26:1).
About this color
#25477B is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.097 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.025 away. White text reads best on it, at 9.26:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.26:1 |
| White text | 9.26:1 |
Values
| HEX | #25477B |
| RGB | rgb(37, 71, 123) |
| HSL | hsl(216, 54%, 31%) |
| OKLCH | oklch(40% 0.097 258.7) |
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 #25477B | 9.26:1 | AAA | Lc -95.5 | Preferred for body text |
| Black text on #25477B | 2.26:1 | Fails | Lc 12.8 | Not readable |
| #25477B text on white | 9.26:1 | AAA | Lc 91.1 | Preferred for body text |
| #25477B text on black | 2.26:1 | Fails | Lc -11.2 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EBF8
oklch(93.7% 0.02 257.5)
-
Step 200
200
#C9DAF4
oklch(88.4% 0.04 258.8)
-
Step 300
300
#A4C2F0
oklch(80.8% 0.073 258.8)
-
Step 400
400
#73A2E8
oklch(70.8% 0.115 258.1)
-
Step 500
500
#4E88E2
oklch(63% 0.149 258.9)
-
Step 600
600
#3170D0
oklch(55.6% 0.162 258.8)
-
Step 700
700
#245DB4
oklch(49.1% 0.151 259)
-
Step 800
800
#1F4D91
oklch(42.7% 0.123 258.4)
-
Step 900
900 (this color)
#25477B
oklch(40% 0.097 258.7)
-
Step 950
950
#132644
oklch(27% 0.061 259.2)
#25477B 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) | #2F4C7D | 0.020 |
| Deuteranopia (no green cones) | #22437A | 0.013 |
| Tritanopia (no blue cones) | #00535B | 0.078 |
| Achromatopsia (no color) | #474747 | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25477B
#25477B
oklch(40% 0.097 258.7)
- #604100
#604100
oklch(40% 0.083 78.1)
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 #25477B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.025
- Light Navy #155084 ΔE 0.028
- Cobalt #1E488F ΔE 0.033
- Deep Sea Blue #015482 ΔE 0.040
- Dusk Blue #26538D ΔE 0.043
- Dark Grey Blue #29465B ΔE 0.055
- Light Navy Blue #2E5A88 ΔE 0.060
- Dark Slate Blue #483D8B ΔE 0.061
Use #25477B 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.