#478BEF
Closest named color: Dark Sky Blue (#448EE4). oklch(64.2% 0.165 258.1), rgb(71, 139, 239).
Aa
Black text reads best on this color (6.20:1).
About this color
#478BEF is a medium-light, vivid blue. In OKLCH its lightness is 64%, its chroma 0.165 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.020 away. Black text reads best on it, at 6.20:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.165) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.20:1 |
| White text | 3.38:1 |
Values
| HEX | #478BEF |
| RGB | rgb(71, 139, 239) |
| HSL | hsl(216, 84%, 61%) |
| OKLCH | oklch(64.2% 0.165 258.1) |
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 #478BEF | 3.38:1 | AA large text | Lc -66.4 | Content text, not long reading |
| Black text on #478BEF | 6.20:1 | AA | Lc 43.1 | Non-text elements, placeholder text |
| #478BEF text on white | 3.38:1 | AA large text | Lc 61.0 | Content text, not long reading |
| #478BEF text on black | 6.20:1 | AA | Lc -40.7 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C7DBF7
oklch(88.5% 0.044 256.8)
-
Step 300
300
#A1C3F5
oklch(81% 0.08 257.9)
-
Step 400
400
#6CA1F0
oklch(70.6% 0.13 258.2)
-
Step 500
500 (this color)
#478BEF
oklch(64.2% 0.165 258.1)
-
Step 600
600
#226FDA
oklch(55.7% 0.18 258.1)
-
Step 700
700
#145CBD
oklch(49.1% 0.167 258.1)
-
Step 800
800
#144C99
oklch(42.8% 0.138 258)
-
Step 900
900
#18407A
oklch(37.7% 0.109 258.1)
-
Step 950
950
#0F2647
oklch(27% 0.068 257.7)
#478BEF 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) | #5B94F3 | 0.032 |
| Deuteranopia (no green cones) | #3E84ED | 0.021 |
| Tritanopia (no blue cones) | #00A2B1 | 0.130 |
| Achromatopsia (no color) | #8C8C8C | 0.165 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #478BEF
#478BEF
oklch(64.2% 0.165 258.1)
- #B88100
#B88100
oklch(64.2% 0.134 78.6)
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 #478BEF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.020
- Chefchaouen Blue #4895EF ΔE 0.027
- Soft Blue #6488EA ΔE 0.028
- Dodger Blue #1E90FF ΔE 0.031
- Cornflower Blue #6495ED ΔE 0.042
- Cornflower #6A79F7 ΔE 0.056
- Clear Blue #247AFD ΔE 0.059
- Water Blue #0E87CC ΔE 0.064
Use #478BEF 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.