#5B57BA
Closest named color: Iris (#6258C4). oklch(51.3% 0.151 281.5), rgb(91, 87, 186).
Aa
White text reads best on this color (5.97:1).
About this color
#5B57BA is a medium-dark, vivid purple. In OKLCH its lightness is 51%, its chroma 0.151 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.019 away. White text reads best on it, at 5.97:1.
| Hue family | Purples |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.51:1 |
| White text | 5.97:1 |
Values
| HEX | #5B57BA |
| RGB | rgb(91, 87, 186) |
| HSL | hsl(242, 42%, 54%) |
| OKLCH | oklch(51.3% 0.151 281.5) |
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 #5B57BA | 5.97:1 | AA | Lc -84.8 | Fine for body text |
| Black text on #5B57BA | 3.51:1 | AA large text | Lc 24.5 | Dividers and decoration only |
| #5B57BA text on white | 5.97:1 | AA | Lc 79.6 | Fine for body text |
| #5B57BA text on black | 3.51:1 | AA large text | Lc -22.2 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E7E9F8
oklch(93.7% 0.02 279.9)
-
Step 200
200
#D4D7F4
oklch(88.6% 0.04 280.9)
-
Step 300
300
#B8BCF0
oklch(81% 0.073 281.2)
-
Step 400
400
#9497E8
oklch(70.6% 0.118 281.3)
-
Step 500
500
#7C7BE1
oklch(63.1% 0.15 281.6)
-
Step 600
600
#6662CF
oklch(55.6% 0.163 281.3)
-
Step 700
700 (this color)
#5B57BA
oklch(51.3% 0.151 281.5)
-
Step 800
800
#464291
oklch(42.7% 0.126 281.9)
-
Step 900
900
#3A3973
oklch(37.7% 0.097 281.5)
-
Step 950
950
#222244
oklch(27.1% 0.062 281.4)
#5B57BA 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) | #2267BD | 0.066 |
| Deuteranopia (no green cones) | #1760B8 | 0.069 |
| Tritanopia (no blue cones) | #366D80 | 0.130 |
| Achromatopsia (no color) | #636363 | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B57BA
#5B57BA
oklch(51.3% 0.151 281.5)
- #746800
#746800
oklch(51.3% 0.107 101.5)
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 #5B57BA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.019
- Slate Blue #6A5ACD ΔE 0.038
- Dark Periwinkle #665FD1 ΔE 0.044
- Light Indigo #6D5ACF ΔE 0.044
- Bluey Purple #6241C7 ΔE 0.054
- Warm Blue #4B57DB ΔE 0.056
- French Blue #436BAD ΔE 0.064
- Blue With A Hint Of Purple #533CC6 ΔE 0.066
Use #5B57BA 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.