#4563BC
Closest named color: French Blue (#436BAD). oklch(52.3% 0.144 267.3), rgb(69, 99, 188).
Aa
White text reads best on this color (5.57:1).
About this color
#4563BC is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.144 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.035 away. White text reads best on it, at 5.57:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.144) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.76:1 |
| White text | 5.57:1 |
Values
| HEX | #4563BC |
| RGB | rgb(69, 99, 188) |
| HSL | hsl(225, 47%, 50%) |
| OKLCH | oklch(52.3% 0.144 267.3) |
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 #4563BC | 5.57:1 | AA | Lc -82.9 | Fine for body text |
| Black text on #4563BC | 3.76:1 | AA large text | Lc 26.5 | Dividers and decoration only |
| #4563BC text on white | 5.57:1 | AA | Lc 77.6 | Fine for body text |
| #4563BC text on black | 3.76:1 | AA large text | Lc -24.2 | 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 700.
-
Step 50
50
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF8
oklch(93.7% 0.02 267.3)
-
Step 200
200
#CED9F4
oklch(88.5% 0.039 267.9)
-
Step 300
300
#ADC0EF
oklch(81% 0.07 267.6)
-
Step 400
400
#829EE6
oklch(70.7% 0.111 267.3)
-
Step 500
500
#6384DF
oklch(63.1% 0.142 267.3)
-
Step 600
600
#4B6CCD
oklch(55.7% 0.154 267.2)
-
Step 700
700 (this color)
#4563BC
oklch(52.3% 0.144 267.3)
-
Step 800
800
#324990
oklch(42.6% 0.12 267.6)
-
Step 900
900
#2C3E73
oklch(37.7% 0.093 267.7)
-
Step 950
950
#1A2543
oklch(27.1% 0.058 267.3)
#4563BC 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) | #366EBF | 0.030 |
| Deuteranopia (no green cones) | #2063BA | 0.033 |
| Tritanopia (no blue cones) | #007786 | 0.122 |
| Achromatopsia (no color) | #686868 | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4563BC
#4563BC
oklch(52.3% 0.144 267.3)
- #846500
#846500
oklch(52.3% 0.107 87.5)
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 #4563BC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.035
- Mid Blue #276AB3 ΔE 0.035
- Iris #6258C4 ΔE 0.047
- Dark Periwinkle #665FD1 ΔE 0.056
- Windows Blue #3778BF ΔE 0.056
- Royal Blue #4169E1 ΔE 0.058
- Warm Blue #4B57DB ΔE 0.058
- Flat Blue #3C73A8 ΔE 0.060
Use #4563BC 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.