#C6403C
Closest named color: Dull Red (#BB3F3F). oklch(56.3% 0.171 26), rgb(198, 64, 60).
Aa
White text reads best on this color (5.00:1).
About this color
#C6403C is a medium-dark, vivid red. In OKLCH its lightness is 56%, its chroma 0.171 and its hue 26°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.023 away. White text reads best on it, at 5.00:1.
| Hue family | Reds |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.171) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 4.19:1 |
| White text | 5.00:1 |
Values
| HEX | #C6403C |
| RGB | rgb(198, 64, 60) |
| HSL | hsl(2, 55%, 51%) |
| OKLCH | oklch(56.3% 0.171 26) |
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 #C6403C | 5.00:1 | AA | Lc -78.9 | Fine for body text |
| Black text on #C6403C | 4.19:1 | AA large text | Lc 30.6 | Non-text elements, placeholder text |
| #C6403C text on white | 5.00:1 | AA | Lc 73.5 | Content text, not long reading |
| #C6403C text on black | 4.19:1 | AA large text | Lc -28.2 | Dividers and decoration only |
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
#FCF3F2
oklch(97.1% 0.01 25.1)
-
Step 100
100
#F9E5E2
oklch(93.7% 0.022 27.8)
-
Step 200
200
#F4CFCB
oklch(88.5% 0.042 25.3)
-
Step 300
300
#EEAEA7
oklch(80.9% 0.076 25.9)
-
Step 400
400
#E38078
oklch(70.6% 0.124 25.5)
-
Step 500
500
#D85C55
oklch(63% 0.158 25.8)
-
Step 600
600 (this color)
#C6403C
oklch(56.3% 0.171 26)
-
Step 700
700
#A82E2C
oklch(49% 0.159 26)
-
Step 800
800
#892826
oklch(42.7% 0.132 25.7)
-
Step 900
900
#6E2723
oklch(37.8% 0.102 26.3)
-
Step 950
950
#411815
oklch(27.1% 0.065 26.5)
#C6403C 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) | #655D3A | 0.183 |
| Deuteranopia (no green cones) | #877A38 | 0.168 |
| Tritanopia (no blue cones) | #D91A40 | 0.052 |
| Achromatopsia (no color) | #6F6F6F | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C6403C
#C6403C
oklch(56.3% 0.171 26)
- #008591
#008591
oklch(56.3% 0.096 205.9)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes and gradients that use #C6403C
These curated palettes and gradients contain exactly #C6403C. Open one to see the full color scheme around it.
Palettes
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.023
- Dusty Red #B9484E ΔE 0.031
- Faded Red #D3494E ΔE 0.036
- Dark Coral #CF524E ΔE 0.041
- Sinopia #BB3E03 ΔE 0.047
- Brick Orange #C14A09 ΔE 0.048
- Dark Rose #B5485D ΔE 0.051
- Cherry #CF0234 ΔE 0.054
Use #C6403C 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.