#4577E7
Closest named color: Royal Blue (#4169E1). oklch(59.4% 0.178 263.7), rgb(69, 119, 231).
Aa
Black text reads best on this color (5.04:1).
About this color
#4577E7 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.178 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.037 away. Black text reads best on it, at 5.04:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.178) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 5.04:1 |
| White text | 4.16:1 |
Values
| HEX | #4577E7 |
| RGB | rgb(69, 119, 231) |
| HSL | hsl(221, 77%, 59%) |
| OKLCH | oklch(59.4% 0.178 263.7) |
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 #4577E7 | 4.16:1 | AA large text | Lc -73.8 | Content text, not long reading |
| Black text on #4577E7 | 5.04:1 | AA | Lc 35.8 | Non-text elements, placeholder text |
| #4577E7 text on white | 4.16:1 | AA large text | Lc 68.3 | Content text, not long reading |
| #4577E7 text on black | 5.04:1 | AA | Lc -33.4 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C9DAFA
oklch(88.6% 0.048 263.1)
-
Step 300
300
#A4C1FA
oklch(81% 0.087 263.6)
-
Step 400
400
#739EF7
oklch(70.7% 0.139 263.7)
-
Step 500
500 (this color)
#4577E7
oklch(59.4% 0.178 263.7)
-
Step 600
600
#3569E3
oklch(55.6% 0.194 263.8)
-
Step 700
700
#2856C5
oklch(49% 0.181 263.9)
-
Step 800
800
#22479F
oklch(42.6% 0.149 263.9)
-
Step 900
900
#203D7E
oklch(37.7% 0.116 263.7)
-
Step 950
950
#13244A
oklch(26.9% 0.074 264)
#4577E7 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) | #3884EB | 0.033 |
| Deuteranopia (no green cones) | #0075E5 | 0.037 |
| Tritanopia (no blue cones) | #0091A4 | 0.142 |
| Achromatopsia (no color) | #7C7C7C | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4577E7
#4577E7
oklch(59.4% 0.178 263.7)
- #A17700
#A17700
oklch(59.5% 0.122 83.8)
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 #4577E7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.037
- Clear Blue #247AFD ΔE 0.038
- Cerulean Blue #056EEE ΔE 0.046
- Cornflower #6A79F7 ΔE 0.049
- Neon Blue #4361EE ΔE 0.055
- Soft Blue #6488EA ΔE 0.059
- Dark Sky Blue #448EE4 ΔE 0.062
- Windows Blue #3778BF ΔE 0.064
Use #4577E7 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.