#AA1003
Closest named color: Rufous (#AE2012). oklch(46.9% 0.185 30.1), rgb(170, 16, 3).
Aa
White text reads best on this color (7.54:1).
About this color
#AA1003 is a medium-dark, vivid red. In OKLCH its lightness is 47%, its chroma 0.185 and its hue 30°. Its hue sits on the warm side of the wheel. The nearest named color is Rufous (#AE2012), ΔE 0.019 away. White text reads best on it, at 7.54:1.
| Hue family | Reds |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.185) |
| Temperature | warm |
| Nearest name | Rufous (#AE2012) |
| Black text | 2.78:1 |
| White text | 7.54:1 |
Values
| HEX | #AA1003 |
| RGB | rgb(170, 16, 3) |
| HSL | hsl(5, 97%, 34%) |
| OKLCH | oklch(46.9% 0.185 30.1) |
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 #AA1003 | 7.54:1 | AAA | Lc -89.0 | Fine for body text |
| Black text on #AA1003 | 2.78:1 | Fails | Lc 20.0 | Dividers and decoration only |
| #AA1003 text on white | 7.54:1 | AAA | Lc 84.0 | Fine for body text |
| #AA1003 text on black | 2.78:1 | Fails | Lc -17.9 | 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
#FDF3F1
oklch(97.1% 0.011 31.1)
-
Step 100
100
#FBE4E0
oklch(93.6% 0.026 29.4)
-
Step 200
200
#F8CEC6
oklch(88.5% 0.049 30.7)
-
Step 300
300
#F5AB9E
oklch(80.9% 0.09 30.2)
-
Step 400
400
#EC7B69
oklch(70.7% 0.143 30.4)
-
Step 500
500
#E35240
oklch(63.2% 0.184 30.1)
-
Step 600
600
#CE2D1D
oklch(55.6% 0.199 30.1)
-
Step 700
700 (this color)
#AA1003
oklch(46.9% 0.185 30.1)
-
Step 800
800
#901C11
oklch(42.6% 0.153 30)
-
Step 900
900
#742016
oklch(37.7% 0.119 30.2)
-
Step 950
950
#44140E
oklch(26.9% 0.076 29.9)
#AA1003 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) | #493F00 | 0.201 |
| Deuteranopia (no green cones) | #6D6000 | 0.179 |
| Tritanopia (no blue cones) | #BC0011 | 0.038 |
| Achromatopsia (no color) | #545454 | 0.186 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #AA1003
#AA1003
oklch(46.9% 0.185 30.1)
- #006674
#006674
oklch(46.8% 0.081 211.1)
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 #AA1003, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rufous #AE2012 ΔE 0.019
- Rust Red #AA2704 ΔE 0.023
- Burnt Red #9F2305 ΔE 0.025
- Firebrick #B22222 ΔE 0.030
- Brown #A52A2A ΔE 0.031
- Carmine #9D0216 ΔE 0.034
- Auburn #9B2226 ΔE 0.036
- Rusty Red #AF2F0D ΔE 0.038
Use #AA1003 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.