#25579E
Closest named color: Dusk Blue (#26538D). oklch(46.2% 0.127 257.7), rgb(37, 87, 158).
Aa
White text reads best on this color (7.15:1).
About this color
#25579E is a medium-dark, moderately saturated blue. In OKLCH its lightness is 46%, its chroma 0.127 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.028 away. White text reads best on it, at 7.15:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 2.93:1 |
| White text | 7.15:1 |
Values
| HEX | #25579E |
| RGB | rgb(37, 87, 158) |
| HSL | hsl(215, 62%, 38%) |
| OKLCH | oklch(46.2% 0.127 257.7) |
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 #25579E | 7.15:1 | AAA | Lc -89.4 | Fine for body text |
| Black text on #25579E | 2.93:1 | Fails | Lc 19.6 | Dividers and decoration only |
| #25579E text on white | 7.15:1 | AAA | Lc 84.5 | Fine for body text |
| #25579E text on black | 2.93:1 | Fails | Lc -17.5 | Dividers and decoration only |
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 700.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EBF6
oklch(93.7% 0.017 256.3)
-
Step 200
200
#CBDAF0
oklch(88.4% 0.034 257.9)
-
Step 300
300
#A8C2E9
oklch(80.8% 0.062 258.4)
-
Step 400
400
#7AA2DE
oklch(70.7% 0.099 258.3)
-
Step 500
500
#578AD5
oklch(63.1% 0.126 257.9)
-
Step 600
600
#3B73C2
oklch(55.7% 0.137 257.4)
-
Step 700
700 (this color)
#25579E
oklch(46.2% 0.127 257.7)
-
Step 800
800
#274E88
oklch(42.7% 0.106 258.3)
-
Step 900
900
#24426C
oklch(37.8% 0.081 257.1)
-
Step 950
950
#162740
oklch(27.2% 0.052 257.9)
#25579E 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) | #335EA1 | 0.026 |
| Deuteranopia (no green cones) | #1B539D | 0.015 |
| Tritanopia (no blue cones) | #006873 | 0.099 |
| Achromatopsia (no color) | #585858 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #25579E
#25579E
oklch(46.2% 0.127 257.7)
- #765000
#765000
oklch(46.1% 0.096 77.2)
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 #25579E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.028
- Denim Blue #3B5B92 ΔE 0.033
- Light Navy Blue #2E5A88 ΔE 0.039
- Light Navy #155084 ΔE 0.048
- Cobalt #1E488F ΔE 0.048
- Dusky Blue #475F94 ΔE 0.049
- Deep Sea Blue #015482 ΔE 0.052
- Peacock Blue #016795 ΔE 0.052
Use #25579E 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.