#63103D
Closest named color: Merlot (#730039). oklch(33.9% 0.123 353), rgb(99, 16, 61).
Aa
White text reads best on this color (12.55:1).
About this color
#63103D is a dark, moderately saturated red. In OKLCH its lightness is 34%, its chroma 0.123 and its hue 353°. Its hue sits on the warm side of the wheel. The nearest named color is Merlot (#730039), ΔE 0.035 away. White text reads best on it, at 12.55:1.
| Hue family | Reds |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.123) |
| Temperature | warm |
| Nearest name | Merlot (#730039) |
| Black text | 1.67:1 |
| White text | 12.55:1 |
Values
| HEX | #63103D |
| RGB | rgb(99, 16, 61) |
| HSL | hsl(327, 72%, 23%) |
| OKLCH | oklch(33.9% 0.123 353) |
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 #63103D | 12.55:1 | AAA | Lc -100.9 | Preferred for body text |
| Black text on #63103D | 1.67:1 | Fails | Lc 0.0 | Not readable |
| #63103D text on white | 12.55:1 | AAA | Lc 97.3 | Preferred for body text |
| #63103D text on black | 1.67:1 | Fails | Lc 0.0 | 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
#FDF2F6
oklch(97.1% 0.013 353.1)
-
Step 100
100
#F9E3EB
oklch(93.6% 0.026 353.5)
-
Step 200
200
#F5CCDC
oklch(88.5% 0.05 352.8)
-
Step 300
300
#F0A8C6
oklch(80.9% 0.092 352.7)
-
Step 400
400
#E576A8
oklch(70.6% 0.148 353.2)
-
Step 500
500
#DA4D93
oklch(63.1% 0.188 353.1)
-
Step 600
600
#C5277D
oklch(55.6% 0.204 353.2)
-
Step 700
700
#AA166A
oklch(49.2% 0.19 353.1)
-
Step 800
800
#8A1856
oklch(42.8% 0.157 353.3)
-
Step 900
900 (this color)
#63103D
oklch(33.9% 0.123 353)
-
Step 950
950
#41132A
oklch(27% 0.077 352.4)
#63103D 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) | #212A3E | 0.138 |
| Deuteranopia (no green cones) | #38393B | 0.123 |
| Tritanopia (no blue cones) | #6B0625 | 0.043 |
| Achromatopsia (no color) | #333333 | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63103D
#63103D
oklch(33.9% 0.123 353)
- #004234
#004234
oklch(33.8% 0.065 172.8)
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 #63103D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Merlot #730039 ΔE 0.035
- Grape Purple #5D1451 ΔE 0.038
- Burgundy #610023 ΔE 0.043
- Velvet #750851 ΔE 0.051
- Rich Purple #720058 ΔE 0.057
- Claret #680018 ΔE 0.058
- Bordeaux #7B002C ΔE 0.060
- Wine #80013F ΔE 0.063
Use #63103D 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.