#4571DB
Closest named color: Royal Blue (#4169E1). oklch(57.3% 0.169 264.7), rgb(69, 113, 219).
Aa
Black text reads best on this color (4.63:1).
About this color
#4571DB is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.169 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.024 away. Black text reads best on it, at 4.63:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.169) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.63:1 |
| White text | 4.52:1 |
Values
| HEX | #4571DB |
| RGB | rgb(69, 113, 219) |
| HSL | hsl(222, 68%, 56%) |
| OKLCH | oklch(57.3% 0.169 264.7) |
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 #4571DB | 4.52:1 | AA | Lc -76.6 | Fine for body text |
| Black text on #4571DB | 4.63:1 | AA | Lc 33.0 | Non-text elements, placeholder text |
| #4571DB text on white | 4.52:1 | AA | Lc 71.1 | Content text, not long reading |
| #4571DB text on black | 4.63:1 | AA | Lc -30.6 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CBD9F6
oklch(88.4% 0.043 265)
-
Step 300
300
#A8C1F3
oklch(81% 0.076 264)
-
Step 400
400
#7B9FED
oklch(70.8% 0.122 264.6)
-
Step 500
500
#5A84E7
oklch(63.1% 0.156 265)
-
Step 600
600 (this color)
#4571DB
oklch(57.3% 0.169 264.7)
-
Step 700
700
#3259B9
oklch(49.1% 0.158 264.6)
-
Step 800
800
#2A4995
oklch(42.6% 0.13 264.7)
-
Step 900
900
#263E77
oklch(37.7% 0.102 264.8)
-
Step 950
950
#162546
oklch(27.1% 0.065 264.1)
#4571DB 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) | #377EDF | 0.033 |
| Deuteranopia (no green cones) | #0870D9 | 0.036 |
| Tritanopia (no blue cones) | #008A9B | 0.139 |
| Achromatopsia (no color) | #767676 | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4571DB
#4571DB
oklch(57.3% 0.169 264.7)
- #987100
#987100
oklch(57.2% 0.117 84.5)
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 #4571DB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.024
- Cerulean Blue #056EEE ΔE 0.046
- Neon Blue #4361EE ΔE 0.050
- Windows Blue #3778BF ΔE 0.052
- Clear Blue #247AFD ΔE 0.056
- Dark Periwinkle #665FD1 ΔE 0.056
- Warm Blue #4B57DB ΔE 0.062
- Cornflower #6A79F7 ΔE 0.065
Use #4571DB 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.