#AC640F
Closest named color: Umber (#B26400). oklch(57.2% 0.127 62), rgb(172, 100, 15).
Aa
Black text reads best on this color (4.58:1).
About this color
#AC640F is a medium-dark, moderately saturated brown. In OKLCH its lightness is 57%, its chroma 0.127 and its hue 62°. Its hue sits on the warm side of the wheel. The nearest named color is Umber (#B26400), ΔE 0.011 away. Black text reads best on it, at 4.58:1.
| Hue family | Browns |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.127) |
| Temperature | warm |
| Nearest name | Umber (#B26400) |
| Black text | 4.58:1 |
| White text | 4.58:1 |
Values
| HEX | #AC640F |
| RGB | rgb(172, 100, 15) |
| HSL | hsl(32, 84%, 37%) |
| OKLCH | oklch(57.2% 0.127 62) |
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 #AC640F | 4.58:1 | AA | Lc -76.9 | Fine for body text |
| Black text on #AC640F | 4.58:1 | AA | Lc 32.7 | Non-text elements, placeholder text |
| #AC640F text on white | 4.58:1 | AA | Lc 71.4 | Content text, not long reading |
| #AC640F text on black | 4.58:1 | AA | Lc -30.3 | Non-text elements, placeholder text |
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 600.
-
Step 50
50
#F9F4F0
oklch(97% 0.008 61.5)
-
Step 100
100
#F2E8DF
oklch(93.6% 0.016 64.7)
-
Step 200
200
#E9D5C4
oklch(88.5% 0.032 62.8)
-
Step 300
300
#DCB99B
oklch(80.9% 0.057 62.5)
-
Step 400
400
#CA9464
oklch(70.8% 0.091 62.2)
-
Step 500
500
#BB7836
oklch(63.1% 0.116 62.3)
-
Step 600
600 (this color)
#AC640F
oklch(57.2% 0.127 62)
-
Step 700
700
#8D4F00
oklch(49.1% 0.113 61.8)
-
Step 800
800
#744001
oklch(42.6% 0.098 61.6)
-
Step 900
900
#5E370F
oklch(37.7% 0.076 61.7)
-
Step 950
950
#37210B
oklch(27.1% 0.048 63.2)
#AC640F 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) | #7A6B00 | 0.091 |
| Deuteranopia (no green cones) | #8B7C10 | 0.081 |
| Tritanopia (no blue cones) | #BD5355 | 0.093 |
| Achromatopsia (no color) | #757575 | 0.127 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AC640F
#AC640F
oklch(57.2% 0.127 62)
- #1A7FBC
#1A7FBC
oklch(57.2% 0.127 242.1)
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 #AC640F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Umber #B26400 ΔE 0.011
- Orangey Brown #B16002 ΔE 0.012
- Raw Umber #A75E09 ΔE 0.018
- Copper #B66325 ΔE 0.024
- Brown Orange #B96902 ΔE 0.028
- Caramel #AF6F09 ΔE 0.029
- Orange Brown #BE6400 ΔE 0.033
- Raw Sienna #9A6200 ΔE 0.035
Use #AC640F 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.