#4F55A1
Closest named color: Twilight (#4E518B). oklch(48.3% 0.121 277.5), rgb(79, 85, 161).
Aa
White text reads best on this color (6.67:1).
About this color
#4F55A1 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.121 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight (#4E518B), ΔE 0.036 away. White text reads best on it, at 6.67:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Twilight (#4E518B) |
| Black text | 3.14:1 |
| White text | 6.67:1 |
Values
| HEX | #4F55A1 |
| RGB | rgb(79, 85, 161) |
| HSL | hsl(236, 34%, 47%) |
| OKLCH | oklch(48.3% 0.121 277.5) |
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 #4F55A1 | 6.67:1 | AA | Lc -87.8 | Fine for body text |
| Black text on #4F55A1 | 3.14:1 | AA large text | Lc 21.3 | Dividers and decoration only |
| #4F55A1 text on white | 6.67:1 | AA | Lc 82.8 | Fine for body text |
| #4F55A1 text on black | 3.14:1 | AA large text | Lc -19.1 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E7E9F5
oklch(93.6% 0.016 278.5)
-
Step 200
200
#D3D8EF
oklch(88.5% 0.032 276)
-
Step 300
300
#B7BEE7
oklch(81% 0.058 277.4)
-
Step 400
400
#929BDB
oklch(70.7% 0.094 277.5)
-
Step 500
500
#7881D1
oklch(63% 0.12 277.5)
-
Step 600
600
#6269BE
oklch(55.5% 0.131 277.7)
-
Step 700
700 (this color)
#4F55A1
oklch(48.3% 0.121 277.5)
-
Step 800
800
#424885
oklch(42.7% 0.1 277)
-
Step 900
900
#383D6A
oklch(37.8% 0.077 277.3)
-
Step 950
950
#21243E
oklch(27.1% 0.048 277.6)
#4F55A1 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) | #3460A4 | 0.040 |
| Deuteranopia (no green cones) | #2C599F | 0.041 |
| Tritanopia (no blue cones) | #2E6573 | 0.105 |
| Achromatopsia (no color) | #5C5C5C | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4F55A1
#4F55A1
oklch(48.3% 0.121 277.5)
- #6E5E00
#6E5E00
oklch(48.3% 0.1 97.6)
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 #4F55A1, closest first.
No curated palette has a color within ΔE 0.04 of #4F55A1.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight #4E518B ΔE 0.036
- Dusky Blue #475F94 ΔE 0.039
- Denim Blue #3B5B92 ΔE 0.041
- Dusk #4E5481 ΔE 0.052
- Blueberry #464196 ΔE 0.057
- French Blue #436BAD ΔE 0.060
- Dusk Blue #26538D ΔE 0.061
- Light Navy Blue #2E5A88 ΔE 0.061
Use #4F55A1 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.