#633E7F
Closest named color: Rebecca Purple (#663399). oklch(43.6% 0.11 308.8), rgb(99, 62, 127).
Aa
White text reads best on this color (8.31:1).
About this color
#633E7F is a dark, moderately saturated purple. In OKLCH its lightness is 44%, its chroma 0.110 and its hue 309°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Rebecca Purple (#663399), ΔE 0.052 away. White text reads best on it, at 8.31:1.
| Hue family | Purples |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.110) |
| Temperature | in between |
| Nearest name | Rebecca Purple (#663399) |
| Black text | 2.52:1 |
| White text | 8.31:1 |
Values
| HEX | #633E7F |
| RGB | rgb(99, 62, 127) |
| HSL | hsl(274, 34%, 37%) |
| OKLCH | oklch(43.6% 0.11 308.8) |
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 #633E7F | 8.31:1 | AAA | Lc -93.1 | Preferred for body text |
| Black text on #633E7F | 2.52:1 | Fails | Lc 15.5 | Dividers and decoration only |
| #633E7F text on white | 8.31:1 | AAA | Lc 88.5 | Fine for body text |
| #633E7F text on black | 2.52:1 | Fails | Lc -13.7 | 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
#F7F4FA
oklch(97.1% 0.009 308.4)
-
Step 100
100
#EDE7F4
oklch(93.6% 0.018 306.7)
-
Step 200
200
#E0D3EC
oklch(88.5% 0.037 308.8)
-
Step 300
300
#CDB6E1
oklch(81% 0.064 309.1)
-
Step 400
400
#B38FD2
oklch(70.7% 0.103 308.5)
-
Step 500
500
#A071C6
oklch(63% 0.133 308.5)
-
Step 600
600
#8B58B2
oklch(55.5% 0.143 308.6)
-
Step 700
700
#764899
oklch(49.1% 0.132 308.5)
-
Step 800
800 (this color)
#633E7F
oklch(43.6% 0.11 308.8)
-
Step 900
900
#4F3364
oklch(37.7% 0.087 309.2)
-
Step 950
950
#2E1E3B
oklch(26.9% 0.056 308.5)
#633E7F 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) | #2D4C81 | 0.087 |
| Deuteranopia (no green cones) | #384F7D | 0.079 |
| Tritanopia (no blue cones) | #5F4958 | 0.080 |
| Achromatopsia (no color) | #4E4E4E | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #633E7F
#633E7F
oklch(43.6% 0.11 308.8)
- #3E5C09
#3E5C09
oklch(43.5% 0.11 128.8)
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 #633E7F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rebecca Purple #663399 ΔE 0.052
- Dark Slate Blue #483D8B ΔE 0.053
- Twilight #4E518B ΔE 0.058
- Blueberry #464196 ΔE 0.063
- Dusk #4E5481 ΔE 0.066
- Light Eggplant #894585 ΔE 0.077
- Dusty Grape #545775 ΔE 0.077
- Denim Blue #3B5B92 ΔE 0.093
Use #633E7F 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.