#C6403A
Closest named color: Dull Red (#BB3F3F). oklch(56.3% 0.171 26.7), rgb(198, 64, 58).
Aa
White text reads best on this color (5.00:1).
About this color
#C6403A is a medium-dark, vivid red. In OKLCH its lightness is 56%, its chroma 0.171 and its hue 27°. 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 | #C6403A |
| RGB | rgb(198, 64, 58) |
| HSL | hsl(3, 55%, 50%) |
| OKLCH | oklch(56.3% 0.171 26.7) |
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 #C6403A | 5.00:1 | AA | Lc -79.0 | Fine for body text |
| Black text on #C6403A | 4.19:1 | AA large text | Lc 30.5 | Non-text elements, placeholder text |
| #C6403A text on white | 5.00:1 | AA | Lc 73.5 | Content text, not long reading |
| #C6403A text on black | 4.19:1 | AA large text | Lc -28.1 | 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
#F4CFCA
oklch(88.5% 0.042 27)
-
Step 300
300
#EFAEA6
oklch(81% 0.078 26.8)
-
Step 400
400
#E38177
oklch(70.8% 0.123 26.7)
-
Step 500
500
#D85C53
oklch(63% 0.158 26.7)
-
Step 600
600 (this color)
#C6403A
oklch(56.3% 0.171 26.7)
-
Step 700
700
#A82E2A
oklch(49% 0.159 26.8)
-
Step 800
800
#892824
oklch(42.7% 0.132 26.7)
-
Step 900
900
#6E2722
oklch(37.7% 0.102 27.1)
-
Step 950
950
#411814
oklch(27.1% 0.065 27.8)
#C6403A 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) | #655D38 | 0.183 |
| Deuteranopia (no green cones) | #877A36 | 0.168 |
| Tritanopia (no blue cones) | #DA1940 | 0.054 |
| Achromatopsia (no color) | #6F6F6F | 0.173 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #C6403A
#C6403A
oklch(56.3% 0.171 26.7)
- #008592
#008592
oklch(56.4% 0.097 206.8)
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 #C6403A, closest first.
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 0.032
- Faded Red #D3494E ΔE 0.037
- Dark Coral #CF524E ΔE 0.041
- Sinopia #BB3E03 ΔE 0.045
- Brick Orange #C14A09 ΔE 0.045
- Dark Rose #B5485D ΔE 0.052
- Burnt Orange #C04E01 ΔE 0.053
Use #C6403A 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.