#F45A31
Closest named color: Orange Pant (#FB5607). oklch(66.6% 0.197 35.6), rgb(244, 90, 49).
Aa
Black text reads best on this color (6.35:1).
About this color
#F45A31 is a medium-light, vivid red. In OKLCH its lightness is 67%, its chroma 0.197 and its hue 36°. Its hue sits on the warm side of the wheel. The nearest named color is Orange Pant (#FB5607), ΔE 0.020 away. Black text reads best on it, at 6.35:1.
| Hue family | Reds |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.197) |
| Temperature | warm |
| Nearest name | Orange Pant (#FB5607) |
| Black text | 6.35:1 |
| White text | 3.30:1 |
Values
| HEX | #F45A31 |
| RGB | rgb(244, 90, 49) |
| HSL | hsl(13, 90%, 57%) |
| OKLCH | oklch(66.6% 0.197 35.6) |
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 #F45A31 | 3.30:1 | AA large text | Lc -64.8 | Content text, not long reading |
| Black text on #F45A31 | 6.35:1 | AA | Lc 44.7 | Non-text elements, placeholder text |
| #F45A31 text on white | 3.30:1 | AA large text | Lc 59.4 | Large or bold text, headings |
| #F45A31 text on black | 6.35:1 | AA | Lc -42.3 | 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
#FEF3F0
oklch(97.2% 0.013 35.7)
-
Step 100
100
#FCE4DD
oklch(93.6% 0.028 36.9)
-
Step 200
200
#FACDC1
oklch(88.4% 0.054 35.4)
-
Step 300
300
#F8AA96
oklch(80.8% 0.097 35)
-
Step 400
400
#F0795A
oklch(70.7% 0.154 35.6)
-
Step 500
500 (this color)
#F45A31
oklch(66.6% 0.197 35.6)
-
Step 600
600
#CB3600
oklch(55.7% 0.192 35.6)
-
Step 700
700
#AC2C00
oklch(49.2% 0.17 35.6)
-
Step 800
800
#8E2300
oklch(42.8% 0.148 35.7)
-
Step 900
900
#771D02
oklch(37.8% 0.129 35.6)
-
Step 950
950
#461306
oklch(27% 0.081 35.5)
#F45A31 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) | #86782B | 0.201 |
| Deuteranopia (no green cones) | #AC9A2A | 0.183 |
| Tritanopia (no blue cones) | #FF2F52 | 0.076 |
| Achromatopsia (no color) | #8D8D8D | 0.198 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #F45A31
#F45A31
oklch(66.6% 0.197 35.6)
- #00A5C2
#00A5C2
oklch(66.5% 0.118 216.2)
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 #F45A31, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Orange Pant #FB5607 ΔE 0.020
- Blood Orange #FE4B03 ΔE 0.027
- Bright Orange #FF5B00 ΔE 0.028
- Tomato #FF6347 ΔE 0.032
- Orange Red #FF4500 ΔE 0.033
- Orangey Red #FA4224 ΔE 0.034
- Orangered #FE420F ΔE 0.035
- Grapefruit #FD5956 ΔE 0.040
Use #F45A31 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.