#63403D
Closest named color: Purple Brown (#673A3F). oklch(41.1% 0.05 24.8), rgb(99, 64, 61).
Aa
White text reads best on this color (9.00:1).
About this color
#63403D is a dark, muted red. In OKLCH its lightness is 41%, its chroma 0.050 and its hue 25°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.019 away. White text reads best on it, at 9.00:1.
| Hue family | Reds |
| Lightness | dark (41%) |
| Chroma | muted (0.050) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.33:1 |
| White text | 9.00:1 |
Values
| HEX | #63403D |
| RGB | rgb(99, 64, 61) |
| HSL | hsl(5, 24%, 31%) |
| OKLCH | oklch(41.1% 0.05 24.8) |
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 #63403D | 9.00:1 | AAA | Lc -95.0 | Preferred for body text |
| Black text on #63403D | 2.33:1 | Fails | Lc 13.4 | Not readable |
| #63403D text on white | 9.00:1 | AAA | Lc 90.6 | Preferred for body text |
| #63403D text on black | 2.33:1 | Fails | Lc -11.7 | 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
#F8F4F4
oklch(97% 0.004 17.2)
-
Step 100
100
#EFE8E7
oklch(93.6% 0.008 27.2)
-
Step 200
200
#E4D5D4
oklch(88.5% 0.017 22.1)
-
Step 300
300
#D3BAB7
oklch(80.9% 0.029 25.9)
-
Step 400
400
#BC9692
oklch(70.7% 0.046 25.3)
-
Step 500
500
#AB7C77
oklch(63.2% 0.06 25.7)
-
Step 600
600
#966560
oklch(55.7% 0.064 25.8)
-
Step 700
700
#7F5350
oklch(49% 0.06 23.8)
-
Step 800
800 (this color)
#63403D
oklch(41.1% 0.05 24.8)
-
Step 900
900
#543A37
oklch(37.7% 0.038 26.4)
-
Step 950
950
#322220
oklch(27.1% 0.025 26.9)
#63403D 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) | #47453D | 0.051 |
| Deuteranopia (no green cones) | #504C3D | 0.047 |
| Tritanopia (no blue cones) | #6A3C3F | 0.018 |
| Achromatopsia (no color) | #494949 | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63403D
#63403D
oklch(41.1% 0.05 24.8)
- #265257
#265257
oklch(41% 0.049 205.2)
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 #63403D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.019
- Brownish Purple #76424E ΔE 0.046
- Mud Brown #60460F ΔE 0.065
- Charcoal Grey #3C4142 ΔE 0.069
- Chestnut #742802 ΔE 0.074
- Milk Chocolate #7F4E1E ΔE 0.084
- Red Brown #8B2E16 ΔE 0.087
- Dark Slate Gray #2F4F4F ΔE 0.087
Use #63403D 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.