#425191
Closest named color: Twilight (#4E518B). oklch(45.5% 0.106 271.7), rgb(66, 81, 145).
Aa
White text reads best on this color (7.45:1).
About this color
#425191 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 45%, its chroma 0.106 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.019 away. White text reads best on it, at 7.45:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.81:1 |
| White text | 7.45:1 |
Values
| HEX | #425191 |
| RGB | rgb(66, 81, 145) |
| HSL | hsl(229, 37%, 41%) |
| OKLCH | oklch(45.5% 0.106 271.7) |
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 #425191 | 7.45:1 | AAA | Lc -90.6 | Preferred for body text |
| Black text on #425191 | 2.81:1 | Fails | Lc 18.3 | Dividers and decoration only |
| #425191 text on white | 7.45:1 | AAA | Lc 85.8 | Fine for body text |
| #425191 text on black | 2.81:1 | Fails | Lc -16.3 | 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 800.
-
Step 50
50
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5E9F6
oklch(93.5% 0.018 272.3)
-
Step 200
200
#D1D8F1
oklch(88.5% 0.035 273.2)
-
Step 300
300
#B2BFE9
oklch(80.9% 0.061 271.5)
-
Step 400
400
#8A9DDF
oklch(70.7% 0.099 271.4)
-
Step 500
500
#6F83D6
oklch(63.1% 0.127 272.1)
-
Step 600
600
#576BC3
oklch(55.5% 0.138 271.6)
-
Step 700
700
#4859A8
oklch(49.1% 0.127 271.8)
-
Step 800
800 (this color)
#425191
oklch(45.5% 0.106 271.7)
-
Step 900
900
#323E6D
oklch(37.7% 0.082 271.2)
-
Step 950
950
#1D2440
oklch(26.9% 0.053 271.8)
#425191 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) | #365993 | 0.025 |
| Deuteranopia (no green cones) | #2D5290 | 0.025 |
| Tritanopia (no blue cones) | #1C5F6A | 0.094 |
| Achromatopsia (no color) | #555555 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #425191
#425191
oklch(45.5% 0.106 271.7)
- #695400
#695400
oklch(45.4% 0.093 92)
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 #425191, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.019
- Denim Blue #3B5B92 ΔE 0.028
- Dusk Blue #26538D ΔE 0.032
- Dusk #4E5481 ΔE 0.034
- Light Navy Blue #2E5A88 ΔE 0.038
- Dusky Blue #475F94 ΔE 0.041
- Blueberry #464196 ΔE 0.044
- Cobalt #1E488F ΔE 0.051
Use #425191 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.