#63403F
Closest named color: Purple Brown (#673A3F). oklch(41.1% 0.049 21.2), rgb(99, 64, 63).
Aa
White text reads best on this color (8.99:1).
About this color
#63403F is a dark, muted red. In OKLCH its lightness is 41%, its chroma 0.049 and its hue 21°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.018 away. White text reads best on it, at 8.99:1.
| Hue family | Reds |
| Lightness | dark (41%) |
| Chroma | muted (0.049) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.33:1 |
| White text | 8.99:1 |
Values
| HEX | #63403F |
| RGB | rgb(99, 64, 63) |
| HSL | hsl(2, 22%, 32%) |
| OKLCH | oklch(41.1% 0.049 21.2) |
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 #63403F | 8.99:1 | AAA | Lc -95.0 | Preferred for body text |
| Black text on #63403F | 2.33:1 | Fails | Lc 13.4 | Not readable |
| #63403F text on white | 8.99:1 | AAA | Lc 90.5 | Preferred for body text |
| #63403F text on black | 2.33:1 | Fails | Lc -11.8 | 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
#D3BAB8
oklch(81% 0.029 23.2)
-
Step 400
400
#BC9694
oklch(70.8% 0.046 21.8)
-
Step 500
500
#AA7C7A
oklch(63.1% 0.058 21.7)
-
Step 600
600
#956463
oklch(55.5% 0.064 20.6)
-
Step 700
700
#7F5352
oklch(49.1% 0.059 20.9)
-
Step 800
800 (this color)
#63403F
oklch(41.1% 0.049 21.2)
-
Step 900
900
#543A39
oklch(37.8% 0.037 21.5)
-
Step 950
950
#312221
oklch(27% 0.023 23.1)
#63403F 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) | #47453F | 0.051 |
| Deuteranopia (no green cones) | #4F4C3E | 0.049 |
| Tritanopia (no blue cones) | #6A3C40 | 0.017 |
| Achromatopsia (no color) | #494949 | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #63403F
#63403F
oklch(41.1% 0.049 21.2)
- #265356
#265356
oklch(41.2% 0.05 201.2)
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 #63403F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.018
- Brownish Purple #76424E ΔE 0.045
- Mud Brown #60460F ΔE 0.068
- Charcoal Grey #3C4142 ΔE 0.069
- Chestnut #742802 ΔE 0.076
- Milk Chocolate #7F4E1E ΔE 0.086
- Dark Slate Gray #2F4F4F ΔE 0.087
- Red Brown #8B2E16 ΔE 0.088
Use #63403F 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.