#409DDA
Closest named color: Chefchaouen Blue (#4895EF). oklch(66.7% 0.126 241.2), rgb(64, 157, 218).
Aa
Black text reads best on this color (7.05:1).
About this color
#409DDA is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.126 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.043 away. Black text reads best on it, at 7.05:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.05:1 |
| White text | 2.97:1 |
Values
| HEX | #409DDA |
| RGB | rgb(64, 157, 218) |
| HSL | hsl(204, 68%, 55%) |
| OKLCH | oklch(66.7% 0.126 241.2) |
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 #409DDA | 2.97:1 | Fails | Lc -61.4 | Content text, not long reading |
| Black text on #409DDA | 7.05:1 | AAA | Lc 48.0 | Large or bold text, headings |
| #409DDA text on white | 2.97:1 | Fails | Lc 56.1 | Large or bold text, headings |
| #409DDA text on black | 7.05:1 | AAA | Lc -45.7 | Large or bold text, headings |
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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0ECF5
oklch(93.7% 0.018 240)
-
Step 200
200
#C6DDEE
oklch(88.6% 0.034 239.9)
-
Step 300
300
#9EC6E5
oklch(80.8% 0.061 241.8)
-
Step 400
400
#65A8D8
oklch(70.6% 0.098 241.2)
-
Step 500
500 (this color)
#409DDA
oklch(66.7% 0.126 241.2)
-
Step 600
600
#007BB8
oklch(55.7% 0.13 241.1)
-
Step 700
700
#00679B
oklch(49.1% 0.115 241)
-
Step 800
800
#005480
oklch(42.6% 0.1 241.3)
-
Step 900
900
#0B4669
oklch(37.7% 0.082 241.4)
-
Step 950
950
#0A293D
oklch(26.9% 0.052 241)
#409DDA 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) | #819EDD | 0.064 |
| Deuteranopia (no green cones) | #6C8FD9 | 0.051 |
| Tritanopia (no blue cones) | #00ACB2 | 0.087 |
| Achromatopsia (no color) | #959595 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #409DDA
#409DDA
oklch(66.7% 0.126 241.2)
- #CB813A
#CB813A
oklch(66.8% 0.125 61.4)
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 #409DDA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.043
- Dark Sky Blue #448EE4 ΔE 0.047
- Cornflower Blue #6495ED ΔE 0.050
- Faded Blue #658CBB ΔE 0.060
- Soft Blue #6488EA ΔE 0.071
- Water Blue #0E87CC ΔE 0.071
- Dodger Blue #1E90FF ΔE 0.074
- Turquoise Blue #06B1C4 ΔE 0.075
Use #409DDA 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.