#644745
Closest named color: Purple Brown (#673A3F). oklch(42.9% 0.04 23.3), rgb(100, 71, 69).
Aa
White text reads best on this color (8.30:1).
About this color
#644745 is a dark, muted red. In OKLCH its lightness is 43%, its chroma 0.040 and its hue 23°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.035 away. White text reads best on it, at 8.30:1.
| Hue family | Reds |
| Lightness | dark (43%) |
| Chroma | muted (0.040) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.52:1 |
| White text | 8.30:1 |
Values
| HEX | #644745 |
| RGB | rgb(100, 71, 69) |
| HSL | hsl(4, 18%, 33%) |
| OKLCH | oklch(42.9% 0.04 23.3) |
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 #644745 | 8.30:1 | AAA | Lc -93.2 | Preferred for body text |
| Black text on #644745 | 2.52:1 | Fails | Lc 15.4 | Dividers and decoration only |
| #644745 text on white | 8.30:1 | AAA | Lc 88.6 | Fine for body text |
| #644745 text on black | 2.52:1 | Fails | Lc -13.6 | 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
#F7F5F4
oklch(97.1% 0.003 48.7)
-
Step 100
100
#EEE8E8
oklch(93.6% 0.007 17.3)
-
Step 200
200
#E2D6D5
oklch(88.5% 0.013 23.2)
-
Step 300
300
#D0BBB9
oklch(80.9% 0.024 24.2)
-
Step 400
400
#B79895
oklch(70.7% 0.037 24.6)
-
Step 500
500
#A57E7C
oklch(63% 0.049 21.9)
-
Step 600
600
#906865
oklch(55.7% 0.052 23.7)
-
Step 700
700
#7A5654
oklch(49.1% 0.048 22.6)
-
Step 800
800 (this color)
#644745
oklch(42.9% 0.04 23.3)
-
Step 900
900
#513B3A
oklch(37.6% 0.031 21.6)
-
Step 950
950
#302322
oklch(27.1% 0.02 23.5)
#644745 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) | #4D4B45 | 0.041 |
| Deuteranopia (no green cones) | #535045 | 0.038 |
| Tritanopia (no blue cones) | #6A4447 | 0.015 |
| Achromatopsia (no color) | #4E4E4E | 0.041 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #644745
#644745
oklch(42.9% 0.04 23.3)
- #345659
#345659
oklch(42.8% 0.04 202.9)
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 #644745, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.035
- Brownish Purple #76424E ΔE 0.040
- Mud Brown #60460F ΔE 0.068
- Charcoal Grey #3C4142 ΔE 0.075
- Milk Chocolate #7F4E1E ΔE 0.076
- Dusty Grape #545775 ΔE 0.079
- Dark Mauve #874C62 ΔE 0.082
- Dark Slate Gray #2F4F4F ΔE 0.082
Use #644745 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.