#4B55B1
Closest named color: Iris (#6258C4). oklch(49.1% 0.145 275.1), rgb(75, 85, 177).
Aa
White text reads best on this color (6.49:1).
About this color
#4B55B1 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.145 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.046 away. White text reads best on it, at 6.49:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.23:1 |
| White text | 6.49:1 |
Values
| HEX | #4B55B1 |
| RGB | rgb(75, 85, 177) |
| HSL | hsl(234, 40%, 49%) |
| OKLCH | oklch(49.1% 0.145 275.1) |
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 #4B55B1 | 6.49:1 | AA | Lc -87.0 | Fine for body text |
| Black text on #4B55B1 | 3.23:1 | AA large text | Lc 22.1 | Dividers and decoration only |
| #4B55B1 text on white | 6.49:1 | AA | Lc 81.9 | Fine for body text |
| #4B55B1 text on black | 3.23:1 | AA large text | Lc -19.9 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E6E9F8
oklch(93.6% 0.02 276.9)
-
Step 200
200
#D1D8F4
oklch(88.6% 0.039 274.4)
-
Step 300
300
#B3BEEF
oklch(81% 0.07 274.9)
-
Step 400
400
#8C9BE6
oklch(70.8% 0.111 274.6)
-
Step 500
500
#7180DF
oklch(63.1% 0.143 274.8)
-
Step 600
600
#5B67CD
oklch(55.6% 0.156 275.1)
-
Step 700
700 (this color)
#4B55B1
oklch(49.1% 0.145 275.1)
-
Step 800
800
#3D468F
oklch(42.6% 0.12 274.9)
-
Step 900
900
#343C72
oklch(37.8% 0.092 274.8)
-
Step 950
950
#1E2343
oklch(26.9% 0.06 275)
#4B55B1 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) | #2262B4 | 0.048 |
| Deuteranopia (no green cones) | #0C5AAF | 0.053 |
| Tritanopia (no blue cones) | #096A7B | 0.127 |
| Achromatopsia (no color) | #5E5E5E | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B55B1
#4B55B1
oklch(49.1% 0.145 275.1)
- #735F00
#735F00
oklch(49.1% 0.101 94.6)
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 #4B55B1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.046
- Dusky Blue #475F94 ΔE 0.058
- Denim Blue #3B5B92 ΔE 0.059
- French Blue #436BAD ΔE 0.060
- Twilight #4E518B ΔE 0.061
- Mid Blue #276AB3 ΔE 0.061
- Bluey Purple #6241C7 ΔE 0.065
- Blueberry #464196 ΔE 0.065
Use #4B55B1 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.