#4570CF
Closest named color: Royal Blue (#4169E1). oklch(56.3% 0.154 263.8), rgb(69, 112, 207).
Aa
White text reads best on this color (4.69:1).
About this color
#4570CF is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.154 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.035 away. White text reads best on it, at 4.69:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.47:1 |
| White text | 4.69:1 |
Values
| HEX | #4570CF |
| RGB | rgb(69, 112, 207) |
| HSL | hsl(221, 59%, 54%) |
| OKLCH | oklch(56.3% 0.154 263.8) |
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 #4570CF | 4.69:1 | AA | Lc -77.8 | Fine for body text |
| Black text on #4570CF | 4.47:1 | AA large text | Lc 31.8 | Non-text elements, placeholder text |
| #4570CF text on white | 4.69:1 | AA | Lc 72.3 | Content text, not long reading |
| #4570CF text on black | 4.47:1 | AA large text | Lc -29.4 | Dividers and decoration only |
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
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CCDAF3
oklch(88.6% 0.038 262.1)
-
Step 300
300
#AAC1EE
oklch(80.9% 0.069 263.7)
-
Step 400
400
#7D9FE6
oklch(70.6% 0.111 264.2)
-
Step 500
500
#5C86DF
oklch(63.1% 0.142 263.7)
-
Step 600
600 (this color)
#4570CF
oklch(56.3% 0.154 263.8)
-
Step 700
700
#355BB1
oklch(49.1% 0.144 263.9)
-
Step 800
800
#2C4B8F
oklch(42.7% 0.118 263.7)
-
Step 900
900
#273F72
oklch(37.6% 0.092 263.6)
-
Step 950
950
#172543
oklch(26.9% 0.059 264)
#4570CF 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) | #407AD3 | 0.026 |
| Deuteranopia (no green cones) | #266ECD | 0.027 |
| Tritanopia (no blue cones) | #008695 | 0.127 |
| Achromatopsia (no color) | #747474 | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4570CF
#4570CF
oklch(56.3% 0.154 263.8)
- #956E00
#956E00
oklch(56.2% 0.115 83.9)
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 #4570CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.035
- Windows Blue #3778BF ΔE 0.037
- French Blue #436BAD ΔE 0.053
- Mid Blue #276AB3 ΔE 0.055
- Dark Periwinkle #665FD1 ΔE 0.055
- Cerulean Blue #056EEE ΔE 0.059
- Neon Blue #4361EE ΔE 0.062
- Flat Blue #3C73A8 ΔE 0.065
Use #4570CF 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.