#63303B
Closest named color: Purple Brown (#673A3F). oklch(38% 0.074 7.6), rgb(99, 48, 59).
Aa
White text reads best on this color (10.41:1).
About this color
#63303B is a dark, moderately saturated red. In OKLCH its lightness is 38%, its chroma 0.074 and its hue 8°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.028 away. White text reads best on it, at 10.41:1.
| Hue family | Reds |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.074) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.01:1 |
| White text | 10.41:1 |
Values
| HEX | #63303B |
| RGB | rgb(99, 48, 59) |
| HSL | hsl(347, 35%, 29%) |
| OKLCH | oklch(38% 0.074 7.6) |
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 #63303B | 10.41:1 | AAA | Lc -97.9 | Preferred for body text |
| Black text on #63303B | 2.01:1 | Fails | Lc 10.1 | Not readable |
| #63303B text on white | 10.41:1 | AAA | Lc 93.9 | Preferred for body text |
| #63303B text on black | 2.01:1 | Fails | Lc -8.7 | 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 900.
-
Step 50
50
#FAF3F4
oklch(97% 0.008 7.3)
-
Step 100
100
#F4E6E8
oklch(93.7% 0.015 7.5)
-
Step 200
200
#EDD1D5
oklch(88.5% 0.032 8)
-
Step 300
300
#E2B2BA
oklch(80.9% 0.057 7.2)
-
Step 400
400
#D18996
oklch(70.7% 0.089 7.8)
-
Step 500
500
#C36A7D
oklch(63.1% 0.114 7.3)
-
Step 600
600
#AE5066
oklch(55.5% 0.124 7.3)
-
Step 700
700
#954155
oklch(49.1% 0.114 7.4)
-
Step 800
800
#793645
oklch(42.7% 0.095 7.9)
-
Step 900
900 (this color)
#63303B
oklch(38% 0.074 7.6)
-
Step 950
950
#3A1C22
oklch(27% 0.048 8)
#63303B 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) | #393A3B | 0.082 |
| Deuteranopia (no green cones) | #46433A | 0.074 |
| Tritanopia (no blue cones) | #6B2B34 | 0.020 |
| Achromatopsia (no color) | #404040 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63303B
#63303B
oklch(38% 0.074 7.6)
- #004D49
#004D49
oklch(37.9% 0.066 188.8)
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 #63303B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.028
- Brownish Purple #76424E ΔE 0.066
- Chestnut #742802 ΔE 0.068
- Wine Red #7B0323 ΔE 0.074
- Reddy Brown #6E1005 ΔE 0.074
- Bordeaux #7B002C ΔE 0.075
- Merlot #730039 ΔE 0.075
- Claret #680018 ΔE 0.080
Use #63303B 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.