#25528A
Closest named color: Dusk Blue (#26538D). oklch(43.7% 0.105 255.3), rgb(37, 82, 138).
Aa
White text reads best on this color (7.91:1).
About this color
#25528A is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.105 and its hue 255°. 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 7.91:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.65:1 |
| White text | 7.91:1 |
Values
| HEX | #25528A |
| RGB | rgb(37, 82, 138) |
| HSL | hsl(213, 58%, 34%) |
| OKLCH | oklch(43.7% 0.105 255.3) |
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 #25528A | 7.91:1 | AAA | Lc -91.9 | Preferred for body text |
| Black text on #25528A | 2.65:1 | Fails | Lc 16.8 | Dividers and decoration only |
| #25528A text on white | 7.91:1 | AAA | Lc 87.2 | Fine for body text |
| #25528A text on black | 2.65:1 | Fails | Lc -14.9 | 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
#E2EBF6
oklch(93.7% 0.018 253.3)
-
Step 200
200
#CBDBF0
oklch(88.6% 0.034 255.2)
-
Step 300
300
#A7C3E8
oklch(80.9% 0.061 255.5)
-
Step 400
400
#77A3DD
oklch(70.7% 0.098 255.6)
-
Step 500
500
#528BD4
oklch(63.1% 0.126 255.4)
-
Step 600
600
#3574C1
oklch(55.6% 0.136 255)
-
Step 700
700
#2861A7
oklch(49.2% 0.127 255.3)
-
Step 800
800 (this color)
#25528A
oklch(43.7% 0.105 255.3)
-
Step 900
900
#21426C
oklch(37.6% 0.082 255.4)
-
Step 950
950
#14273F
oklch(27% 0.052 255)
#25528A 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) | #38568C | 0.024 |
| Deuteranopia (no green cones) | #284D89 | 0.014 |
| Tritanopia (no blue cones) | #005F67 | 0.082 |
| Achromatopsia (no color) | #515151 | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25528A
#25528A
oklch(43.7% 0.105 255.3)
- #6E4900
#6E4900
oklch(43.6% 0.092 75.7)
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 #25528A, 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 0.017
- Deep Sea Blue #015482 ΔE 0.025
- Light Navy Blue #2E5A88 ΔE 0.027
- Cobalt #1E488F ΔE 0.033
- Denim Blue #3B5B92 ΔE 0.039
- Twilight #4E518B ΔE 0.049
- Dusk #4E5481 ΔE 0.052
Use #25528A 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.