#409DDF
Closest named color: Chefchaouen Blue (#4895EF). oklch(67% 0.131 243.2), rgb(64, 157, 223).
Aa
Black text reads best on this color (7.10:1).
About this color
#409DDF is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.131 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.036 away. Black text reads best on it, at 7.10:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.10:1 |
| White text | 2.95:1 |
Values
| HEX | #409DDF |
| RGB | rgb(64, 157, 223) |
| HSL | hsl(205, 71%, 56%) |
| OKLCH | oklch(67% 0.131 243.2) |
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 #409DDF | 2.95:1 | Fails | Lc -61.1 | Content text, not long reading |
| Black text on #409DDF | 7.10:1 | AAA | Lc 48.3 | Large or bold text, headings |
| #409DDF text on white | 2.95:1 | Fails | Lc 55.7 | Large or bold text, headings |
| #409DDF text on black | 7.10:1 | AAA | Lc -46.0 | 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 400.
-
Step 50
50
#EFF6FC
oklch(97% 0.011 243.7)
-
Step 100
100
#DDECF9
oklch(93.6% 0.024 244.1)
-
Step 200
200
#C0DDF5
oklch(88.4% 0.045 243.2)
-
Step 300
300
#92C7F2
oklch(80.8% 0.082 243.5)
-
Step 400
400 (this color)
#409DDF
oklch(67% 0.131 243.2)
-
Step 500
500
#0091DE
oklch(63.1% 0.153 243.2)
-
Step 600
600
#007ABB
oklch(55.7% 0.134 242.9)
-
Step 700
700
#00669E
oklch(49% 0.119 243.2)
-
Step 800
800
#005483
oklch(42.8% 0.104 243)
-
Step 900
900
#00456E
oklch(37.6% 0.092 243.7)
-
Step 950
950
#002944
oklch(27% 0.066 243.6)
#409DDF 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) | #7F9EE2 | 0.061 |
| Deuteranopia (no green cones) | #698FDE | 0.048 |
| Tritanopia (no blue cones) | #00ADB4 | 0.093 |
| Achromatopsia (no color) | #969696 | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #409DDF
#409DDF
oklch(67% 0.131 243.2)
- #CD8131
#CD8131
oklch(67% 0.131 63)
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 #409DDF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.036
- Dark Sky Blue #448EE4 ΔE 0.043
- Cornflower Blue #6495ED ΔE 0.044
- Faded Blue #658CBB ΔE 0.065
- Soft Blue #6488EA ΔE 0.066
- Dodger Blue #1E90FF ΔE 0.068
- Water Blue #0E87CC ΔE 0.072
- Turquoise Blue #06B1C4 ΔE 0.080
Use #409DDF 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.