#EF4D00
Closest named color: Blood Orange (#FE4B03). oklch(64.1% 0.209 38.3), rgb(239, 77, 0).
Aa
Black text reads best on this color (5.73:1).
About this color
#EF4D00 is a medium-light, vivid red. In OKLCH its lightness is 64%, its chroma 0.209 and its hue 38°. Its hue sits on the warm side of the wheel. The nearest named color is Blood Orange (#FE4B03), ΔE 0.028 away. Black text reads best on it, at 5.73:1.
| Hue family | Reds |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.209) |
| Temperature | warm |
| Nearest name | Blood Orange (#FE4B03) |
| Black text | 5.73:1 |
| White text | 3.66:1 |
Values
| HEX | #EF4D00 |
| RGB | rgb(239, 77, 0) |
| HSL | hsl(19, 100%, 47%) |
| OKLCH | oklch(64.1% 0.209 38.3) |
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 #EF4D00 | 3.66:1 | AA large text | Lc -68.4 | Content text, not long reading |
| Black text on #EF4D00 | 5.73:1 | AA | Lc 41.2 | Non-text elements, placeholder text |
| #EF4D00 text on white | 3.66:1 | AA large text | Lc 62.9 | Content text, not long reading |
| #EF4D00 text on black | 5.73:1 | AA | Lc -38.8 | 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
#FEF3EF
oklch(97.2% 0.013 41.2)
-
Step 100
100
#FDE4DC
oklch(93.7% 0.03 38.6)
-
Step 200
200
#FCCDBE
oklch(88.5% 0.057 38.4)
-
Step 300
300
#FAAA90
oklch(80.9% 0.102 38.8)
-
Step 400
400
#F4774F
oklch(70.8% 0.163 38.3)
-
Step 500
500 (this color)
#EF4D00
oklch(64.1% 0.209 38.3)
-
Step 600
600
#C63E00
oklch(55.6% 0.181 38.2)
-
Step 700
700
#A73300
oklch(49% 0.16 38.2)
-
Step 800
800
#8A2900
oklch(42.7% 0.139 38.4)
-
Step 900
900
#742100
oklch(37.7% 0.122 38.4)
-
Step 950
950
#471201
oklch(27% 0.085 38.5)
#EF4D00 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) | #7E6E00 | 0.210 |
| Deuteranopia (no green cones) | #A69300 | 0.189 |
| Tritanopia (no blue cones) | #FF0543 | 0.085 |
| Achromatopsia (no color) | #868686 | 0.210 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #EF4D00
#EF4D00
oklch(64.1% 0.209 38.3)
- #009DBB
#009DBB
oklch(64.2% 0.115 217.8)
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 #EF4D00, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blood Orange #FE4B03 ΔE 0.028
- Orange Pant #FB5607 ΔE 0.030
- Orangey Red #FA4224 ΔE 0.030
- Orange Red #FF4500 ΔE 0.030
- Orangered #FE420F ΔE 0.030
- Red Orange #FD3C06 ΔE 0.032
- Vermillion #F4320C ΔE 0.036
- Deep Orange #DC4D01 ΔE 0.037
Use #EF4D00 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.