#EC5603
Closest named color: Orange Pant (#FB5607). oklch(64.7% 0.199 40.8), rgb(236, 86, 3).
Aa
Black text reads best on this color (5.89:1).
About this color
#EC5603 is a medium-light, vivid orange. In OKLCH its lightness is 65%, its chroma 0.199 and its hue 41°. Its hue sits on the warm side of the wheel. The nearest named color is Orange Pant (#FB5607), ΔE 0.029 away. Black text reads best on it, at 5.89:1.
| Hue family | Oranges |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.199) |
| Temperature | warm |
| Nearest name | Orange Pant (#FB5607) |
| Black text | 5.89:1 |
| White text | 3.55:1 |
Values
| HEX | #EC5603 |
| RGB | rgb(236, 86, 3) |
| HSL | hsl(21, 97%, 47%) |
| OKLCH | oklch(64.7% 0.199 40.8) |
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 #EC5603 | 3.55:1 | AA large text | Lc -67.5 | Content text, not long reading |
| Black text on #EC5603 | 5.89:1 | AA | Lc 42.0 | Non-text elements, placeholder text |
| #EC5603 text on white | 3.55:1 | AA large text | Lc 62.1 | Content text, not long reading |
| #EC5603 text on black | 5.89:1 | AA | Lc -39.6 | 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
#FBE4DC
oklch(93.5% 0.028 40.2)
-
Step 200
200
#FACEBE
oklch(88.5% 0.055 41)
-
Step 300
300
#F7AC90
oklch(81% 0.097 41.3)
-
Step 400
400
#EF7B4F
oklch(70.7% 0.155 40.9)
-
Step 500
500 (this color)
#EC5603
oklch(64.7% 0.199 40.8)
-
Step 600
600
#C14400
oklch(55.5% 0.172 40.7)
-
Step 700
700
#A33900
oklch(49.1% 0.151 41.1)
-
Step 800
800
#872D00
oklch(42.7% 0.132 40.7)
-
Step 900
900
#722500
oklch(37.8% 0.117 40.9)
-
Step 950
950
#461401
oklch(27.1% 0.082 40.5)
#EC5603 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) | #837200 | 0.194 |
| Deuteranopia (no green cones) | #A79400 | 0.175 |
| Tritanopia (no blue cones) | #FF284A | 0.089 |
| Achromatopsia (no color) | #888888 | 0.200 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #EC5603
#EC5603
oklch(64.7% 0.199 40.8)
- #009EC0
#009EC0
oklch(64.7% 0.118 220.4)
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 #EC5603, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Orange Pant #FB5607 ΔE 0.029
- Blood Orange #FE4B03 ΔE 0.035
- Deep Orange #DC4D01 ΔE 0.037
- Bright Orange #FF5B00 ΔE 0.039
- Orange Red #FF4500 ΔE 0.039
- Orangered #FE420F ΔE 0.041
- Orangey Red #FA4224 ΔE 0.042
- Red Orange #FD3C06 ΔE 0.044
Use #EC5603 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.