#4580DF
Closest named color: Dark Sky Blue (#448EE4). oklch(60.8% 0.157 259.5), rgb(69, 128, 223).
Aa
Black text reads best on this color (5.40:1).
About this color
#4580DF is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.157 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.037 away. Black text reads best on it, at 5.40:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.40:1 |
| White text | 3.88:1 |
Values
| HEX | #4580DF |
| RGB | rgb(69, 128, 223) |
| HSL | hsl(217, 71%, 57%) |
| OKLCH | oklch(60.8% 0.157 259.5) |
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 #4580DF | 3.88:1 | AA large text | Lc -71.5 | Content text, not long reading |
| Black text on #4580DF | 5.40:1 | AA | Lc 38.1 | Non-text elements, placeholder text |
| #4580DF text on white | 3.88:1 | AA large text | Lc 66.0 | Content text, not long reading |
| #4580DF text on black | 5.40:1 | AA | Lc -35.7 | 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
#E1EBF9
oklch(93.7% 0.022 256.7)
-
Step 200
200
#C9DAF6
oklch(88.4% 0.043 260.4)
-
Step 300
300
#A3C2F3
oklch(80.9% 0.077 259.4)
-
Step 400
400
#72A1ED
oklch(70.7% 0.123 259.7)
-
Step 500
500 (this color)
#4580DF
oklch(60.8% 0.157 259.5)
-
Step 600
600
#2E6FD5
oklch(55.6% 0.171 259.3)
-
Step 700
700
#215CB9
oklch(49.1% 0.159 259.5)
-
Step 800
800
#1D4C95
oklch(42.7% 0.131 259.2)
-
Step 900
900
#1E4077
oklch(37.8% 0.102 259.6)
-
Step 950
950
#122646
oklch(27.1% 0.065 259.4)
#4580DF 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) | #5289E3 | 0.029 |
| Deuteranopia (no green cones) | #387BDD | 0.019 |
| Tritanopia (no blue cones) | #0096A5 | 0.125 |
| Achromatopsia (no color) | #818181 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4580DF
#4580DF
oklch(60.8% 0.157 259.5)
- #AA7800
#AA7800
oklch(60.8% 0.126 79.4)
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 #4580DF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.037
- Soft Blue #6488EA ΔE 0.044
- Water Blue #0E87CC ΔE 0.047
- Windows Blue #3778BF ΔE 0.054
- Clear Blue #247AFD ΔE 0.054
- Cornflower #6A79F7 ΔE 0.058
- Chefchaouen Blue #4895EF ΔE 0.058
- Dodger Blue #1E90FF ΔE 0.059
Use #4580DF 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.