#613F40
Closest named color: Purple Brown (#673A3F). oklch(40.7% 0.048 17.4), rgb(97, 63, 64).
Aa
White text reads best on this color (9.15:1).
About this color
#613F40 is a dark, muted red. In OKLCH its lightness is 41%, its chroma 0.048 and its hue 17°. Its hue sits on the warm side of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.017 away. White text reads best on it, at 9.15:1.
| Hue family | Reds |
| Lightness | dark (41%) |
| Chroma | muted (0.048) |
| Temperature | warm |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.29:1 |
| White text | 9.15:1 |
Values
| HEX | #613F40 |
| RGB | rgb(97, 63, 64) |
| HSL | hsl(358, 21%, 31%) |
| OKLCH | oklch(40.7% 0.048 17.4) |
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 #613F40 | 9.15:1 | AAA | Lc -95.4 | Preferred for body text |
| Black text on #613F40 | 2.29:1 | Fails | Lc 13.0 | Not readable |
| #613F40 text on white | 9.15:1 | AAA | Lc 91.0 | Preferred for body text |
| #613F40 text on black | 2.29:1 | Fails | Lc -11.3 | 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
#EFE8E8
oklch(93.6% 0.008 17.3)
-
Step 200
200
#E3D5D5
oklch(88.4% 0.016 17.5)
-
Step 300
300
#D2BABA
oklch(80.9% 0.027 17.7)
-
Step 400
400
#BB9696
oklch(70.7% 0.045 18.3)
-
Step 500
500
#A97C7D
oklch(63.1% 0.056 17.3)
-
Step 600
600
#946566
oklch(55.6% 0.061 17.8)
-
Step 700
700
#7E5355
oklch(49% 0.058 16.3)
-
Step 800
800 (this color)
#613F40
oklch(40.7% 0.048 17.4)
-
Step 900
900
#543A3A
oklch(37.8% 0.037 18.9)
-
Step 950
950
#312222
oklch(27% 0.023 18.7)
#613F40 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) | #454440 | 0.051 |
| Deuteranopia (no green cones) | #4D4A3F | 0.047 |
| Tritanopia (no blue cones) | #683C40 | 0.015 |
| Achromatopsia (no color) | #484848 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #613F40
#613F40
oklch(40.7% 0.048 17.4)
- #275253
#275253
oklch(40.8% 0.048 197.4)
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 #613F40, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.017
- Brownish Purple #76424E ΔE 0.048
- Charcoal Grey #3C4142 ΔE 0.065
- Mud Brown #60460F ΔE 0.071
- Chestnut #742802 ΔE 0.077
- Onyx #343A40 ΔE 0.084
- Dark Slate Gray #2F4F4F ΔE 0.086
- Milk Chocolate #7F4E1E ΔE 0.091
Use #613F40 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.