#63137A
Closest named color: Indigo (#4B0082). oklch(37.8% 0.166 317), rgb(99, 19, 122).
Aa
White text reads best on this color (11.02:1).
About this color
#63137A is a dark, vivid purple. In OKLCH its lightness is 38%, its chroma 0.166 and its hue 317°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Indigo (#4B0082), ΔE 0.062 away. White text reads best on it, at 11.02:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | vivid (0.166) |
| Temperature | in between |
| Nearest name | Indigo (#4B0082) |
| Black text | 1.90:1 |
| White text | 11.02:1 |
Values
| HEX | #63137A |
| RGB | rgb(99, 19, 122) |
| HSL | hsl(287, 73%, 28%) |
| OKLCH | oklch(37.8% 0.166 317) |
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 #63137A | 11.02:1 | AAA | Lc -98.2 | Preferred for body text |
| Black text on #63137A | 1.90:1 | Fails | Lc 9.7 | Not readable |
| #63137A text on white | 11.02:1 | AAA | Lc 94.3 | Preferred for body text |
| #63137A text on black | 1.90:1 | Fails | Lc -8.3 | 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 900.
-
Step 50
50
#FAF2FD
oklch(97% 0.017 316.9)
-
Step 100
100
#F4E3FA
oklch(93.6% 0.036 317.3)
-
Step 200
200
#ECCCF8
oklch(88.6% 0.069 316.8)
-
Step 300
300
#E1A7F6
oklch(80.9% 0.124 316.8)
-
Step 400
400
#D172F1
oklch(70.7% 0.199 317)
-
Step 500
500
#C440EC
oklch(63.2% 0.255 317)
-
Step 600
600
#AE00D8
oklch(55.6% 0.271 316.9)
-
Step 700
700
#9300B7
oklch(49.1% 0.24 316.9)
-
Step 800
800
#790097
oklch(42.6% 0.208 316.9)
-
Step 900
900 (this color)
#63137A
oklch(37.8% 0.166 317)
-
Step 950
950
#3A0F47
oklch(27% 0.104 317.2)
#63137A 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) | #00377D | 0.151 |
| Deuteranopia (no green cones) | #143E78 | 0.145 |
| Tritanopia (no blue cones) | #622C48 | 0.104 |
| Achromatopsia (no color) | #3C3C3C | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63137A
#63137A
oklch(37.8% 0.166 317)
- #1F4F00
#1F4F00
oklch(37.9% 0.115 137.2)
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 #63137A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Indigo #4B0082 ΔE 0.062
- Purple #800080 ΔE 0.062
- Royal Purple #4B006E ΔE 0.063
- Rich Purple #720058 ΔE 0.069
- Grape Purple #5D1451 ΔE 0.071
- Rebecca Purple #663399 ΔE 0.073
- Velvet #750851 ΔE 0.083
- Plum Purple #4E0550 ΔE 0.086
Use #63137A 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.