#25518D
Closest named color: Dusk Blue (#26538D). oklch(43.6% 0.111 256.9), rgb(37, 81, 141).
Aa
White text reads best on this color (7.95:1).
About this color
#25518D is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.111 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.006 away. White text reads best on it, at 7.95:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.111) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.64:1 |
| White text | 7.95:1 |
Values
| HEX | #25518D |
| RGB | rgb(37, 81, 141) |
| HSL | hsl(215, 58%, 35%) |
| OKLCH | oklch(43.6% 0.111 256.9) |
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 #25518D | 7.95:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #25518D | 2.64:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #25518D text on white | 7.95:1 | AAA | Lc 87.3 | Fine for body text |
| #25518D text on black | 2.64:1 | Fails | Lc -14.8 | 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 800.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF7
oklch(93.7% 0.019 255.5)
-
Step 200
200
#CADBF1
oklch(88.6% 0.035 254.9)
-
Step 300
300
#A6C3EB
oklch(80.9% 0.065 256.5)
-
Step 400
400
#76A3E1
oklch(70.8% 0.104 256.6)
-
Step 500
500
#528AD8
oklch(63.1% 0.132 257)
-
Step 600
600
#3673C5
oklch(55.7% 0.142 256.7)
-
Step 700
700
#2860AB
oklch(49.2% 0.134 256.8)
-
Step 800
800 (this color)
#25518D
oklch(43.6% 0.111 256.9)
-
Step 900
900
#21426E
oklch(37.8% 0.085 256.3)
-
Step 950
950
#142741
oklch(27.1% 0.055 256.6)
#25518D 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) | #34568F | 0.023 |
| Deuteranopia (no green cones) | #234C8C | 0.015 |
| Tritanopia (no blue cones) | #005F68 | 0.086 |
| Achromatopsia (no color) | #515151 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25518D
#25518D
oklch(43.6% 0.111 256.9)
- #6D4A00
#6D4A00
oklch(43.7% 0.091 77.7)
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 #25518D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.006
- Light Navy #155084 ΔE 0.020
- Cobalt #1E488F ΔE 0.028
- Deep Sea Blue #015482 ΔE 0.029
- Light Navy Blue #2E5A88 ΔE 0.032
- Denim Blue #3B5B92 ΔE 0.040
- Twilight #4E518B ΔE 0.050
- Dusk #4E5481 ΔE 0.055
Use #25518D 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.