#AA403D
Closest named color: Dull Red (#BB3F3F). oklch(51.7% 0.14 24.9), rgb(170, 64, 61).
Aa
White text reads best on this color (5.98:1).
About this color
#AA403D is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.140 and its hue 25°. Its hue sits on the warm side of the wheel. The nearest named color is Dull Red (#BB3F3F), ΔE 0.033 away. White text reads best on it, at 5.98:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.140) |
| Temperature | warm |
| Nearest name | Dull Red (#BB3F3F) |
| Black text | 3.50:1 |
| White text | 5.98:1 |
Values
| HEX | #AA403D |
| RGB | rgb(170, 64, 61) |
| HSL | hsl(2, 47%, 45%) |
| OKLCH | oklch(51.7% 0.14 24.9) |
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 #AA403D | 5.98:1 | AA | Lc -84.4 | Fine for body text |
| Black text on #AA403D | 3.50:1 | AA large text | Lc 24.9 | Dividers and decoration only |
| #AA403D text on white | 5.98:1 | AA | Lc 79.1 | Fine for body text |
| #AA403D text on black | 3.50:1 | AA large text | Lc -22.7 | 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
#FCF3F2
oklch(97.1% 0.01 25.1)
-
Step 100
100
#F7E5E3
oklch(93.6% 0.02 25.2)
-
Step 200
200
#F1D0CD
oklch(88.5% 0.037 24)
-
Step 300
300
#E9B0AB
oklch(80.8% 0.067 24.4)
-
Step 400
400
#DC857E
oklch(70.7% 0.108 25.1)
-
Step 500
500
#D0635E
oklch(63% 0.139 24.5)
-
Step 600
600
#BB4744
oklch(55.5% 0.151 24.8)
-
Step 700
700 (this color)
#AA403D
oklch(51.7% 0.14 24.9)
-
Step 800
800
#832F2D
oklch(42.7% 0.116 24.7)
-
Step 900
900
#6A2B28
oklch(37.8% 0.091 25.1)
-
Step 950
950
#3E1A18
oklch(27% 0.057 24.8)
#AA403D 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) | #5B553C | 0.150 |
| Deuteranopia (no green cones) | #766C3A | 0.138 |
| Tritanopia (no blue cones) | #BA2A40 | 0.043 |
| Achromatopsia (no color) | #636363 | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AA403D
#AA403D
oklch(51.7% 0.14 24.9)
- #007680
#007680
oklch(51.6% 0.088 205.1)
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 #AA403D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Red #BB3F3F ΔE 0.033
- Light Maroon #A24857 ΔE 0.036
- Brick #A03623 ΔE 0.038
- Dusty Red #B9484E ΔE 0.040
- Brown #A52A2A ΔE 0.042
- Light Burgundy #A8415B ΔE 0.042
- Rusty Red #AF2F0D ΔE 0.042
- Firebrick #B22222 ΔE 0.045
Use #AA403D 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.