#425F71
Closest named color: YInMn Blue (#415A77). oklch(47% 0.045 236.3), rgb(66, 95, 113).
Aa
White text reads best on this color (6.75:1).
About this color
#425F71 is a medium-dark, muted blue. In OKLCH its lightness is 47%, its chroma 0.045 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.021 away. White text reads best on it, at 6.75:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 3.10:1 |
| White text | 6.75:1 |
Values
| HEX | #425F71 |
| RGB | rgb(66, 95, 113) |
| HSL | hsl(203, 26%, 35%) |
| OKLCH | oklch(47% 0.045 236.3) |
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 #425F71 | 6.75:1 | AA | Lc -88.3 | Fine for body text |
| Black text on #425F71 | 3.10:1 | AA large text | Lc 20.8 | Dividers and decoration only |
| #425F71 text on white | 6.75:1 | AA | Lc 83.3 | Fine for body text |
| #425F71 text on black | 3.10:1 | AA large text | Lc -18.7 | 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
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E6EBED
oklch(93.7% 0.006 223.5)
-
Step 200
200
#D2DAE0
oklch(88.4% 0.012 239.9)
-
Step 300
300
#B4C3CD
oklch(80.9% 0.022 236.8)
-
Step 400
400
#8DA4B4
oklch(70.6% 0.035 238.4)
-
Step 500
500
#708EA1
oklch(63.1% 0.044 236.2)
-
Step 600
600
#58788C
oklch(55.6% 0.048 236.2)
-
Step 700
700 (this color)
#425F71
oklch(47% 0.045 236.3)
-
Step 800
800
#3B5261
oklch(42.6% 0.038 237.4)
-
Step 900
900
#33444F
oklch(37.7% 0.029 236.9)
-
Step 950
950
#1E282E
oklch(27% 0.018 234.7)
#425F71 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) | #575E72 | 0.029 |
| Deuteranopia (no green cones) | #505971 | 0.025 |
| Tritanopia (no blue cones) | #306465 | 0.035 |
| Achromatopsia (no color) | #5B5B5B | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #425F71
#425F71
oklch(47% 0.045 236.3)
- #6F5442
#6F5442
oklch(46.9% 0.046 55)
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 #425F71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.021
- Slate #516572 ΔE 0.028
- Dusty Grape #545775 ΔE 0.035
- Denim #3B638C ΔE 0.043
- Light Navy Blue #2E5A88 ΔE 0.049
- Petrol #005F6A ΔE 0.049
- Dusk #4E5481 ΔE 0.050
- Dark Aqua #05696B ΔE 0.053
Use #425F71 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.