#409CD3
Closest named color: Chefchaouen Blue (#4895EF). oklch(66.2% 0.119 238.6), rgb(64, 156, 211).
Aa
Black text reads best on this color (6.91:1).
About this color
#409CD3 is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.119 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.051 away. Black text reads best on it, at 6.91:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 6.91:1 |
| White text | 3.03:1 |
Values
| HEX | #409CD3 |
| RGB | rgb(64, 156, 211) |
| HSL | hsl(202, 63%, 54%) |
| OKLCH | oklch(66.2% 0.119 238.6) |
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 #409CD3 | 3.03:1 | AA large text | Lc -62.2 | Content text, not long reading |
| Black text on #409CD3 | 6.91:1 | AA | Lc 47.2 | Large or bold text, headings |
| #409CD3 text on white | 3.03:1 | AA large text | Lc 56.9 | Large or bold text, headings |
| #409CD3 text on black | 6.91:1 | AA | Lc -44.9 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF4
oklch(93.6% 0.017 236.7)
-
Step 200
200
#C6DDEC
oklch(88.5% 0.032 236.4)
-
Step 300
300
#9EC7E2
oklch(80.9% 0.058 237.3)
-
Step 400
400
#67A9D4
oklch(70.7% 0.092 238.5)
-
Step 500
500 (this color)
#409CD3
oklch(66.2% 0.119 238.6)
-
Step 600
600
#007CB3
oklch(55.7% 0.124 238.2)
-
Step 700
700
#006898
oklch(49.2% 0.11 238.7)
-
Step 800
800
#00557D
oklch(42.7% 0.096 238.5)
-
Step 900
900
#0D4666
oklch(37.6% 0.078 239.5)
-
Step 950
950
#0B293C
oklch(26.9% 0.05 240.3)
#409CD3 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) | #829CD6 | 0.065 |
| Deuteranopia (no green cones) | #6E8ED2 | 0.053 |
| Tritanopia (no blue cones) | #00AAAF | 0.080 |
| Achromatopsia (no color) | #949494 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #409CD3
#409CD3
oklch(66.2% 0.119 238.6)
- #C87F42
#C87F42
oklch(66.1% 0.119 58.4)
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 #409CD3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.051
- Dark Sky Blue #448EE4 ΔE 0.051
- Faded Blue #658CBB ΔE 0.054
- Cornflower Blue #6495ED ΔE 0.057
- Water Blue #0E87CC ΔE 0.067
- Cool Blue #4984B8 ΔE 0.070
- Greyblue #77A1B5 ΔE 0.070
- Turquoise Blue #06B1C4 ΔE 0.071
Use #409CD3 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.