#478AD9
Closest named color: Dark Sky Blue (#448EE4). oklch(62.6% 0.138 254), rgb(71, 138, 217).
Aa
Black text reads best on this color (5.90:1).
About this color
#478AD9 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.138 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.018 away. Black text reads best on it, at 5.90:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.90:1 |
| White text | 3.55:1 |
Values
| HEX | #478AD9 |
| RGB | rgb(71, 138, 217) |
| HSL | hsl(212, 66%, 56%) |
| OKLCH | oklch(62.6% 0.138 254) |
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 #478AD9 | 3.55:1 | AA large text | Lc -68.4 | Content text, not long reading |
| Black text on #478AD9 | 5.90:1 | AA | Lc 41.2 | Non-text elements, placeholder text |
| #478AD9 text on white | 3.55:1 | AA large text | Lc 62.9 | Content text, not long reading |
| #478AD9 text on black | 5.90:1 | AA | Lc -38.8 | 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
#C9DBF2
oklch(88.5% 0.037 254.6)
-
Step 300
300
#A3C4EC
oklch(81% 0.067 253.5)
-
Step 400
400
#70A4E3
oklch(70.8% 0.108 253.9)
-
Step 500
500 (this color)
#478AD9
oklch(62.6% 0.138 254)
-
Step 600
600
#2874C8
oklch(55.7% 0.149 254)
-
Step 700
700
#1961AD
oklch(49.2% 0.139 253.8)
-
Step 800
800
#184F8C
oklch(42.6% 0.116 254.1)
-
Step 900
900
#1B4270
oklch(37.6% 0.091 254.4)
-
Step 950
950
#112742
oklch(27% 0.058 254.7)
#478AD9 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) | #678FDC | 0.037 |
| Deuteranopia (no green cones) | #5282D7 | 0.022 |
| Tritanopia (no blue cones) | #009CA7 | 0.108 |
| Achromatopsia (no color) | #888888 | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #478AD9
#478AD9
oklch(62.6% 0.138 254)
- #B77A00
#B77A00
oklch(62.7% 0.133 74.2)
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 #478AD9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.018
- Water Blue #0E87CC ΔE 0.039
- Soft Blue #6488EA ΔE 0.041
- Chefchaouen Blue #4895EF ΔE 0.041
- Cool Blue #4984B8 ΔE 0.050
- Cornflower Blue #6495ED ΔE 0.051
- Faded Blue #658CBB ΔE 0.055
- Steel Blue #4682B4 ΔE 0.057
Use #478AD9 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.