#408CD9
Closest named color: Dark Sky Blue (#448EE4). oklch(62.8% 0.139 251.2), rgb(64, 140, 217).
Aa
Black text reads best on this color (5.97:1).
About this color
#408CD9 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.139 and its hue 251°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.017 away. Black text reads best on it, at 5.97:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.97:1 |
| White text | 3.51:1 |
Values
| HEX | #408CD9 |
| RGB | rgb(64, 140, 217) |
| HSL | hsl(210, 67%, 55%) |
| OKLCH | oklch(62.8% 0.139 251.2) |
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 #408CD9 | 3.51:1 | AA large text | Lc -67.9 | Content text, not long reading |
| Black text on #408CD9 | 5.97:1 | AA | Lc 41.6 | Non-text elements, placeholder text |
| #408CD9 text on white | 3.51:1 | AA large text | Lc 62.4 | Content text, not long reading |
| #408CD9 text on black | 5.97:1 | AA | Lc -39.3 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C7DBF2
oklch(88.4% 0.038 251.9)
-
Step 300
300
#A1C4EC
oklch(80.9% 0.068 252)
-
Step 400
400
#6CA5E2
oklch(70.7% 0.108 251.1)
-
Step 500
500 (this color)
#408CD9
oklch(62.8% 0.139 251.2)
-
Step 600
600
#1A75C7
oklch(55.5% 0.15 251.2)
-
Step 700
700
#0862AC
oklch(49.1% 0.14 251.1)
-
Step 800
800
#0E508C
oklch(42.6% 0.117 251.5)
-
Step 900
900
#164370
oklch(37.7% 0.091 251.6)
-
Step 950
950
#0F2841
oklch(27.1% 0.056 250.6)
#408CD9 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) | #6990DC | 0.043 |
| Deuteranopia (no green cones) | #5382D7 | 0.029 |
| Tritanopia (no blue cones) | #009EA8 | 0.105 |
| Achromatopsia (no color) | #898989 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #408CD9
#408CD9
oklch(62.8% 0.139 251.2)
- #BB7800
#BB7800
oklch(62.8% 0.135 70.8)
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 #408CD9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.017
- Water Blue #0E87CC ΔE 0.036
- Chefchaouen Blue #4895EF ΔE 0.039
- Soft Blue #6488EA ΔE 0.045
- Cool Blue #4984B8 ΔE 0.050
- Cornflower Blue #6495ED ΔE 0.053
- Faded Blue #658CBB ΔE 0.055
- Dodger Blue #1E90FF ΔE 0.057
Use #408CD9 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.