#4E55B5
Closest named color: Iris (#6258C4). oklch(49.6% 0.15 276.3), rgb(78, 85, 181).
Aa
White text reads best on this color (6.38:1).
About this color
#4E55B5 is a medium-dark, vivid blue. In OKLCH its lightness is 50%, its chroma 0.150 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.039 away. White text reads best on it, at 6.38:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.29:1 |
| White text | 6.38:1 |
Values
| HEX | #4E55B5 |
| RGB | rgb(78, 85, 181) |
| HSL | hsl(236, 41%, 51%) |
| OKLCH | oklch(49.6% 0.15 276.3) |
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 #4E55B5 | 6.38:1 | AA | Lc -86.6 | Fine for body text |
| Black text on #4E55B5 | 3.29:1 | AA large text | Lc 22.6 | Dividers and decoration only |
| #4E55B5 text on white | 6.38:1 | AA | Lc 81.4 | Fine for body text |
| #4E55B5 text on black | 3.29:1 | AA large text | Lc -20.4 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E6E9F8
oklch(93.6% 0.02 276.9)
-
Step 200
200
#D1D7F4
oklch(88.4% 0.04 276.3)
-
Step 300
300
#B4BDF0
oklch(80.9% 0.073 276.8)
-
Step 400
400
#8D9AE8
oklch(70.7% 0.115 275.8)
-
Step 500
500
#737EE1
oklch(63% 0.148 276.5)
-
Step 600
600
#5D65CF
oklch(55.5% 0.161 276.5)
-
Step 700
700 (this color)
#4E55B5
oklch(49.6% 0.15 276.3)
-
Step 800
800
#3F4591
oklch(42.7% 0.123 276.4)
-
Step 900
900
#353B74
oklch(37.8% 0.096 276.2)
-
Step 950
950
#1F2344
oklch(27.1% 0.061 276.3)
#4E55B5 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) | #1D63B8 | 0.054 |
| Deuteranopia (no green cones) | #035BB3 | 0.059 |
| Tritanopia (no blue cones) | #126B7D | 0.131 |
| Achromatopsia (no color) | #5F5F5F | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4E55B5
#4E55B5
oklch(49.6% 0.15 276.3)
- #736100
#736100
oklch(49.5% 0.102 96.4)
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 #4E55B5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.039
- Slate Blue #6A5ACD ΔE 0.058
- Bluey Purple #6241C7 ΔE 0.059
- Warm Blue #4B57DB ΔE 0.059
- Blue With A Hint Of Purple #533CC6 ΔE 0.062
- Dark Periwinkle #665FD1 ΔE 0.062
- French Blue #436BAD ΔE 0.062
- Mid Blue #276AB3 ΔE 0.063
Use #4E55B5 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.