#4579E0
Closest named color: Royal Blue (#4169E1). oklch(59.3% 0.167 262.4), rgb(69, 121, 224).
Aa
Black text reads best on this color (5.06:1).
About this color
#4579E0 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.167 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.042 away. Black text reads best on it, at 5.06:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.167) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 5.06:1 |
| White text | 4.14:1 |
Values
| HEX | #4579E0 |
| RGB | rgb(69, 121, 224) |
| HSL | hsl(220, 71%, 57%) |
| OKLCH | oklch(59.3% 0.167 262.4) |
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 #4579E0 | 4.14:1 | AA large text | Lc -73.7 | Content text, not long reading |
| Black text on #4579E0 | 5.06:1 | AA | Lc 35.9 | Non-text elements, placeholder text |
| #4579E0 text on white | 4.14:1 | AA large text | Lc 68.2 | Content text, not long reading |
| #4579E0 text on black | 5.06:1 | AA | Lc -33.5 | 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 600.
-
Step 50
50
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CBDAF5
oklch(88.6% 0.041 262.3)
-
Step 300
300
#A7C1F2
oklch(80.9% 0.075 262.9)
-
Step 400
400
#78A0EB
oklch(70.8% 0.119 262.3)
-
Step 500
500
#5586E5
oklch(63.1% 0.153 262.3)
-
Step 600
600 (this color)
#4579E0
oklch(59.3% 0.167 262.4)
-
Step 700
700
#2D5BB7
oklch(49.2% 0.155 262.3)
-
Step 800
800
#264B94
oklch(42.8% 0.128 262.2)
-
Step 900
900
#233F76
oklch(37.7% 0.1 262.3)
-
Step 950
950
#152545
oklch(26.9% 0.064 262.8)
#4579E0 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) | #4484E4 | 0.029 |
| Deuteranopia (no green cones) | #2376DE | 0.027 |
| Tritanopia (no blue cones) | #0091A2 | 0.134 |
| Achromatopsia (no color) | #7C7C7C | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4579E0
#4579E0
oklch(59.3% 0.167 262.4)
- #A27600
#A27600
oklch(59.4% 0.122 82.4)
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 #4579E0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.042
- Clear Blue #247AFD ΔE 0.047
- Windows Blue #3778BF ΔE 0.053
- Cerulean Blue #056EEE ΔE 0.053
- Cornflower #6A79F7 ΔE 0.055
- Dark Sky Blue #448EE4 ΔE 0.055
- Soft Blue #6488EA ΔE 0.056
- Water Blue #0E87CC ΔE 0.058
Use #4579E0 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.