#C6640F
Closest named color: Rust (#CA6702). oklch(60.9% 0.15 52.8), rgb(198, 100, 15).
Aa
Black text reads best on this color (5.23:1).
About this color
#C6640F is a medium-dark, vivid orange. In OKLCH its lightness is 61%, its chroma 0.150 and its hue 53°. Its hue sits on the warm side of the wheel. The nearest named color is Rust (#CA6702), ΔE 0.012 away. Black text reads best on it, at 5.23:1.
| Hue family | Oranges |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.150) |
| Temperature | warm |
| Nearest name | Rust (#CA6702) |
| Black text | 5.23:1 |
| White text | 4.01:1 |
Values
| HEX | #C6640F |
| RGB | rgb(198, 100, 15) |
| HSL | hsl(28, 86%, 42%) |
| OKLCH | oklch(60.9% 0.15 52.8) |
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 #C6640F | 4.01:1 | AA large text | Lc -72.4 | Content text, not long reading |
| Black text on #C6640F | 5.23:1 | AA | Lc 37.2 | Non-text elements, placeholder text |
| #C6640F text on white | 4.01:1 | AA large text | Lc 66.9 | Content text, not long reading |
| #C6640F text on black | 5.23:1 | AA | Lc -34.8 | 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 500.
-
Step 50
50
#FBF4EF
oklch(97.1% 0.01 58.2)
-
Step 100
100
#F6E6DD
oklch(93.5% 0.021 51.5)
-
Step 200
200
#F0D2C1
oklch(88.4% 0.041 51.4)
-
Step 300
300
#E7B495
oklch(80.9% 0.073 52.7)
-
Step 400
400
#DA8B57
oklch(70.8% 0.118 53)
-
Step 500
500 (this color)
#C6640F
oklch(60.9% 0.15 52.8)
-
Step 600
600
#B15700
oklch(55.7% 0.141 53.1)
-
Step 700
700
#954800
oklch(49% 0.124 53)
-
Step 800
800
#7B3A00
oklch(42.6% 0.109 52.7)
-
Step 900
900
#673000
oklch(37.6% 0.095 53.2)
-
Step 950
950
#3D1C04
oklch(26.9% 0.062 52.9)
#C6640F 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) | #817100 | 0.126 |
| Deuteranopia (no green cones) | #98870B | 0.114 |
| Tritanopia (no blue cones) | #DA4D56 | 0.095 |
| Achromatopsia (no color) | #7F7F7F | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C6640F
#C6640F
oklch(60.9% 0.15 52.8)
- #008EC1
#008EC1
oklch(60.8% 0.125 232.9)
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 #C6640F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rust #CA6702 ΔE 0.012
- Orange Brown #BE6400 ΔE 0.016
- Browny Orange #CA6B02 ΔE 0.019
- Tiger's Eye #BC6C25 ΔE 0.023
- Rusty Orange #CD5909 ΔE 0.025
- Brown Orange #B96902 ΔE 0.027
- Chocolate #D2691E ΔE 0.027
- Terra Cotta #C9643B ΔE 0.031
Use #C6640F 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.