#425F99
Closest named color: Dusky Blue (#475F94). oklch(49.1% 0.1 263.1), rgb(66, 95, 153).
Aa
White text reads best on this color (6.30:1).
About this color
#425F99 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 49%, its chroma 0.100 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.010 away. White text reads best on it, at 6.30:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.32:1 |
| White text | 6.30:1 |
Values
| HEX | #425F99 |
| RGB | rgb(66, 95, 153) |
| HSL | hsl(220, 40%, 43%) |
| OKLCH | oklch(49.1% 0.1 263.1) |
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 #425F99 | 6.30:1 | AA | Lc -86.4 | Fine for body text |
| Black text on #425F99 | 3.32:1 | AA large text | Lc 22.8 | Dividers and decoration only |
| #425F99 text on white | 6.30:1 | AA | Lc 81.3 | Fine for body text |
| #425F99 text on black | 3.32:1 | AA large text | Lc -20.6 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF4
oklch(93.6% 0.015 264.5)
-
Step 200
200
#D0DAEB
oklch(88.6% 0.026 261.1)
-
Step 300
300
#B0C1E1
oklch(80.9% 0.049 263.1)
-
Step 400
400
#87A1D1
oklch(70.7% 0.077 262.4)
-
Step 500
500
#6A89C5
oklch(63.1% 0.098 263)
-
Step 600
600
#5172B2
oklch(55.6% 0.107 262.7)
-
Step 700
700 (this color)
#425F99
oklch(49.1% 0.1 263.1)
-
Step 800
800
#374E7C
oklch(42.8% 0.082 263.2)
-
Step 900
900
#2F4164
oklch(37.7% 0.065 262.9)
-
Step 950
950
#1C263A
oklch(26.9% 0.04 263.6)
#425F99 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) | #47649B | 0.016 |
| Deuteranopia (no green cones) | #3C5C98 | 0.012 |
| Tritanopia (no blue cones) | #096C74 | 0.091 |
| Achromatopsia (no color) | #606060 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #425F99
#425F99
oklch(49.1% 0.1 263.1)
- #7C5A03
#7C5A03
oklch(49% 0.1 82.6)
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 #425F99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.010
- Denim Blue #3B5B92 ΔE 0.018
- Denim #3B638C ΔE 0.028
- Light Navy Blue #2E5A88 ΔE 0.039
- Twilight #4E518B ΔE 0.042
- French Blue #436BAD ΔE 0.042
- Dusk #4E5481 ΔE 0.045
- Peacock Blue #016795 ΔE 0.046
Use #425F99 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.