#CB603F
Closest named color: Terra Cotta (#C9643B). oklch(61.4% 0.144 37.7), rgb(203, 96, 63).
Aa
Black text reads best on this color (5.28:1).
About this color
#CB603F is a medium-dark, vivid red. In OKLCH its lightness is 61%, its chroma 0.144 and its hue 38°. Its hue sits on the warm side of the wheel. The nearest named color is Terra Cotta (#C9643B), ΔE 0.011 away. Black text reads best on it, at 5.28:1.
| Hue family | Reds |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.144) |
| Temperature | warm |
| Nearest name | Terra Cotta (#C9643B) |
| Black text | 5.28:1 |
| White text | 3.97:1 |
Values
| HEX | #CB603F |
| RGB | rgb(203, 96, 63) |
| HSL | hsl(14, 57%, 52%) |
| OKLCH | oklch(61.4% 0.144 37.7) |
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 #CB603F | 3.97:1 | AA large text | Lc -72.0 | Content text, not long reading |
| Black text on #CB603F | 5.28:1 | AA | Lc 37.6 | Non-text elements, placeholder text |
| #CB603F text on white | 3.97:1 | AA large text | Lc 66.5 | Content text, not long reading |
| #CB603F text on black | 5.28:1 | AA | Lc -35.1 | 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
#FCF3F1
oklch(97.1% 0.01 32.5)
-
Step 100
100
#F7E6E0
oklch(93.7% 0.02 40.5)
-
Step 200
200
#F1D1C7
oklch(88.5% 0.039 38.1)
-
Step 300
300
#EAB1A0
oklch(80.8% 0.071 37.3)
-
Step 400
400
#DD876C
oklch(70.8% 0.113 38.2)
-
Step 500
500 (this color)
#CB603F
oklch(61.4% 0.144 37.7)
-
Step 600
600
#BC4924
oklch(55.5% 0.157 37.6)
-
Step 700
700
#A23A16
oklch(49.1% 0.145 38)
-
Step 800
800
#843115
oklch(42.8% 0.121 38.1)
-
Step 900
900
#6A2C19
oklch(37.7% 0.094 37.6)
-
Step 950
950
#3E1B10
oklch(27% 0.058 38.1)
#CB603F 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) | #7D713B | 0.141 |
| Deuteranopia (no green cones) | #97893D | 0.130 |
| Tritanopia (no blue cones) | #DE4A59 | 0.067 |
| Achromatopsia (no color) | #808080 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #CB603F
#CB603F
oklch(61.4% 0.144 37.7)
- #0093B0
#0093B0
oklch(61.2% 0.11 218.3)
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 #CB603F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Terra Cotta #C9643B ΔE 0.011
- Terracotta #CA6641 ΔE 0.013
- Terracota #CB6843 ΔE 0.017
- Adobe #BD6C48 ΔE 0.033
- Rusty Orange #CD5909 ΔE 0.033
- Dark Coral #CF524E ΔE 0.039
- Indian Red #CD5C5C ΔE 0.039
- Chocolate #D2691E ΔE 0.040
Use #CB603F 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.