#4151A3
Closest named color: Twilight (#4E518B). oklch(46.6% 0.133 272), rgb(65, 81, 163).
Aa
White text reads best on this color (7.16:1).
About this color
#4151A3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.133 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.043 away. White text reads best on it, at 7.16:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 2.93:1 |
| White text | 7.16:1 |
Values
| HEX | #4151A3 |
| RGB | rgb(65, 81, 163) |
| HSL | hsl(230, 43%, 45%) |
| OKLCH | oklch(46.6% 0.133 272) |
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 #4151A3 | 7.16:1 | AAA | Lc -89.5 | Fine for body text |
| Black text on #4151A3 | 2.93:1 | Fails | Lc 19.4 | Dividers and decoration only |
| #4151A3 text on white | 7.16:1 | AAA | Lc 84.6 | Fine for body text |
| #4151A3 text on black | 2.93:1 | Fails | Lc -17.4 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5E9F7
oklch(93.5% 0.019 273.2)
-
Step 200
200
#D1D8F2
oklch(88.5% 0.037 273.7)
-
Step 300
300
#B2BFEB
oklch(81% 0.064 272)
-
Step 400
400
#8A9DE1
oklch(70.8% 0.102 271.6)
-
Step 500
500
#6E83D9
oklch(63.2% 0.132 271.8)
-
Step 600
600
#576BC6
oklch(55.7% 0.142 271.7)
-
Step 700
700 (this color)
#4151A3
oklch(46.6% 0.133 272)
-
Step 800
800
#3B498B
oklch(42.8% 0.11 272)
-
Step 900
900
#323D6F
oklch(37.7% 0.087 272.3)
-
Step 950
950
#1D2441
oklch(26.9% 0.055 272)
#4151A3 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) | #265CA6 | 0.036 |
| Deuteranopia (no green cones) | #1353A1 | 0.041 |
| Tritanopia (no blue cones) | #006472 | 0.117 |
| Achromatopsia (no color) | #585858 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4151A3
#4151A3
oklch(46.6% 0.133 272)
- #6D5700
#6D5700
oklch(46.6% 0.095 91.7)
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 #4151A3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.043
- Denim Blue #3B5B92 ΔE 0.043
- Blueberry #464196 ΔE 0.044
- Dusk Blue #26538D ΔE 0.049
- Dusky Blue #475F94 ΔE 0.051
- Light Navy Blue #2E5A88 ΔE 0.059
- Cobalt #1E488F ΔE 0.059
- Dusk #4E5481 ΔE 0.060
Use #4151A3 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.