#425F88
Closest named color: Denim (#3B638C). oklch(48.1% 0.075 257.1), rgb(66, 95, 136).
Aa
White text reads best on this color (6.51:1).
About this color
#425F88 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.075 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Denim (#3B638C), ΔE 0.013 away. White text reads best on it, at 6.51:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Denim (#3B638C) |
| Black text | 3.22:1 |
| White text | 6.51:1 |
Values
| HEX | #425F88 |
| RGB | rgb(66, 95, 136) |
| HSL | hsl(215, 35%, 40%) |
| OKLCH | oklch(48.1% 0.075 257.1) |
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 #425F88 | 6.51:1 | AA | Lc -87.3 | Fine for body text |
| Black text on #425F88 | 3.22:1 | AA large text | Lc 21.8 | Dividers and decoration only |
| #425F88 text on white | 6.51:1 | AA | Lc 82.2 | Fine for body text |
| #425F88 text on black | 3.22:1 | AA large text | Lc -19.7 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF1
oklch(93.5% 0.011 256.7)
-
Step 200
200
#D1DAE7
oklch(88.5% 0.02 257.5)
-
Step 300
300
#B2C2D8
oklch(80.9% 0.036 256.4)
-
Step 400
400
#8AA2C5
oklch(70.6% 0.058 257.7)
-
Step 500
500
#6D8BB6
oklch(63.1% 0.074 257.4)
-
Step 600
600
#5475A2
oklch(55.6% 0.08 256.3)
-
Step 700
700 (this color)
#425F88
oklch(48.1% 0.075 257.1)
-
Step 800
800
#395071
oklch(42.7% 0.062 257.4)
-
Step 900
900
#31425B
oklch(37.6% 0.048 257.9)
-
Step 950
950
#1D2735
oklch(27% 0.03 256.9)
#425F88 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) | #4F618A | 0.019 |
| Deuteranopia (no green cones) | #475B87 | 0.012 |
| Tritanopia (no blue cones) | #22686D | 0.067 |
| Achromatopsia (no color) | #5E5E5E | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #425F88
#425F88
oklch(48.1% 0.075 257.1)
- #765829
#765829
oklch(48.2% 0.075 76.5)
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 #425F88, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim #3B638C ΔE 0.013
- Dusky Blue #475F94 ΔE 0.021
- Denim Blue #3B5B92 ΔE 0.024
- Light Navy Blue #2E5A88 ΔE 0.028
- YInMn Blue #415A77 ΔE 0.029
- Dusk #4E5481 ΔE 0.033
- Dusty Grape #545775 ΔE 0.039
- Twilight #4E518B ΔE 0.043
Use #425F88 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.