#5B278F
Closest named color: Rebecca Purple (#663399). oklch(40.3% 0.163 302.4), rgb(91, 39, 143).
Aa
White text reads best on this color (9.85:1).
About this color
#5B278F is a dark, vivid purple. In OKLCH its lightness is 40%, its chroma 0.163 and its hue 302°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.037 away. White text reads best on it, at 9.85:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | vivid (0.163) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.13:1 |
| White text | 9.85:1 |
Values
| HEX | #5B278F |
| RGB | rgb(91, 39, 143) |
| HSL | hsl(270, 57%, 36%) |
| OKLCH | oklch(40.3% 0.163 302.4) |
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 #5B278F | 9.85:1 | AAA | Lc -96.4 | Preferred for body text |
| Black text on #5B278F | 2.13:1 | Fails | Lc 11.8 | Not readable |
| #5B278F text on white | 9.85:1 | AAA | Lc 92.1 | Preferred for body text |
| #5B278F text on black | 2.13:1 | Fails | Lc -10.3 | Not readable |
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 800.
-
Step 50
50
#F7F4FD
oklch(97.2% 0.012 301.3)
-
Step 100
100
#EDE6FA
oklch(93.6% 0.028 301.7)
-
Step 200
200
#DFD1F7
oklch(88.4% 0.054 302.1)
-
Step 300
300
#CCB2F4
oklch(80.9% 0.095 302.4)
-
Step 400
400
#B387EE
oklch(70.7% 0.152 302.4)
-
Step 500
500
#A164E9
oklch(63% 0.195 302.3)
-
Step 600
600
#8D46D7
oklch(55.6% 0.212 302.4)
-
Step 700
700
#7836BA
oklch(49.1% 0.197 302.5)
-
Step 800
800 (this color)
#5B278F
oklch(40.3% 0.163 302.4)
-
Step 900
900
#4F2B78
oklch(37.6% 0.127 302.2)
-
Step 950
950
#2E1A46
oklch(26.9% 0.08 302.3)
#5B278F 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) | #004292 | 0.118 |
| Deuteranopia (no green cones) | #00438D | 0.120 |
| Tritanopia (no blue cones) | #504058 | 0.119 |
| Achromatopsia (no color) | #434343 | 0.164 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B278F
#5B278F
oklch(40.3% 0.163 302.4)
- #3F5000
#3F5000
oklch(40.2% 0.098 122.6)
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 #5B278F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.037
- Dark Slate Blue #483D8B ΔE 0.056
- Chrysanthemum #560BAD ΔE 0.059
- Blueberry #464196 ΔE 0.065
- Indigo #4B0082 ΔE 0.067
- Imperial Purple #480CA8 ΔE 0.068
- Grape #7209B7 ΔE 0.079
- Royal Purple #4B006E ΔE 0.087
Use #5B278F 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.