#A3403A
Closest named color: Brick (#A03623). oklch(50.5% 0.133 26.4), rgb(163, 64, 58).
Aa
White text reads best on this color (6.26:1).
About this color
#A3403A is a medium-dark, moderately saturated red. In OKLCH its lightness is 51%, its chroma 0.133 and its hue 26°. Its hue sits on the warm side of the wheel. The nearest named color is Brick (#A03623), ΔE 0.028 away. White text reads best on it, at 6.26:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.133) |
| Temperature | warm |
| Nearest name | Brick (#A03623) |
| Black text | 3.35:1 |
| White text | 6.26:1 |
Values
| HEX | #A3403A |
| RGB | rgb(163, 64, 58) |
| HSL | hsl(3, 48%, 43%) |
| OKLCH | oklch(50.5% 0.133 26.4) |
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 #A3403A | 6.26:1 | AA | Lc -85.7 | Fine for body text |
| Black text on #A3403A | 3.35:1 | AA large text | Lc 23.6 | Dividers and decoration only |
| #A3403A text on white | 6.26:1 | AA | Lc 80.5 | Fine for body text |
| #A3403A text on black | 3.35:1 | AA large text | Lc -21.3 | 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 700.
-
Step 50
50
#FBF3F2
oklch(97% 0.009 26)
-
Step 100
100
#F6E5E3
oklch(93.5% 0.019 25.6)
-
Step 200
200
#F0D1CD
oklch(88.6% 0.035 26.6)
-
Step 300
300
#E7B1AB
oklch(80.8% 0.064 25.8)
-
Step 400
400
#D9877E
oklch(70.7% 0.102 26.7)
-
Step 500
500
#CD675E
oklch(63.2% 0.131 26.6)
-
Step 600
600
#B84B44
oklch(55.6% 0.143 26.4)
-
Step 700
700 (this color)
#A3403A
oklch(50.5% 0.133 26.4)
-
Step 800
800
#80322D
oklch(42.6% 0.109 26.4)
-
Step 900
900
#682D28
oklch(37.8% 0.086 26.8)
-
Step 950
950
#3D1B18
oklch(27% 0.054 26.5)
#A3403A 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) | #5A5339 | 0.139 |
| Deuteranopia (no green cones) | #726837 | 0.129 |
| Tritanopia (no blue cones) | #B32C3F | 0.044 |
| Achromatopsia (no color) | #606060 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #A3403A
#A3403A
oklch(50.5% 0.133 26.4)
- #00727D
#00727D
oklch(50.4% 0.086 206.5)
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 #A3403A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Brick #A03623 ΔE 0.028
- Brown #A52A2A ΔE 0.037
- Light Maroon #A24857 ΔE 0.038
- Russet #A13905 ΔE 0.042
- Rusty Red #AF2F0D ΔE 0.043
- Burnt Umber #A0450E ΔE 0.045
- Light Burgundy #A8415B ΔE 0.047
- Sienna #A0522D ΔE 0.048
Use #A3403A 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.