#4C64CB
Closest named color: Royal Blue (#4169E1). oklch(54% 0.161 270.3), rgb(76, 100, 203).
Aa
White text reads best on this color (5.25:1).
About this color
#4C64CB is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.161 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.036 away. White text reads best on it, at 5.25:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.161) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 3.99:1 |
| White text | 5.25:1 |
Values
| HEX | #4C64CB |
| RGB | rgb(76, 100, 203) |
| HSL | hsl(229, 55%, 55%) |
| OKLCH | oklch(54% 0.161 270.3) |
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 #4C64CB | 5.25:1 | AA | Lc -81.2 | Fine for body text |
| Black text on #4C64CB | 3.99:1 | AA large text | Lc 28.3 | Dividers and decoration only |
| #4C64CB text on white | 5.25:1 | AA | Lc 75.8 | Fine for body text |
| #4C64CB text on black | 3.99:1 | AA large text | Lc -25.9 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF8
oklch(93.7% 0.02 267.3)
-
Step 200
200
#CFD8F5
oklch(88.4% 0.041 271.9)
-
Step 300
300
#AEBFF1
oklch(80.9% 0.073 270.1)
-
Step 400
400
#859CE9
oklch(70.6% 0.116 270.6)
-
Step 500
500
#6882E3
oklch(63.2% 0.149 270.4)
-
Step 600
600 (this color)
#4C64CB
oklch(54% 0.161 270.3)
-
Step 700
700
#4157B5
oklch(49.1% 0.151 270.1)
-
Step 800
800
#364892
oklch(42.8% 0.123 270.2)
-
Step 900
900
#2E3D75
oklch(37.8% 0.097 270)
-
Step 950
950
#1B2444
oklch(27% 0.061 270.1)
#4C64CB 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) | #2A72CF | 0.042 |
| Deuteranopia (no green cones) | #0067C9 | 0.049 |
| Tritanopia (no blue cones) | #007C8E | 0.137 |
| Achromatopsia (no color) | #6C6C6C | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4C64CB
#4C64CB
oklch(54% 0.161 270.3)
- #876B00
#876B00
oklch(54% 0.11 90.6)
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 #4C64CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.036
- Dark Periwinkle #665FD1 ΔE 0.037
- Iris #6258C4 ΔE 0.039
- Warm Blue #4B57DB ΔE 0.041
- Slate Blue #6A5ACD ΔE 0.045
- Light Indigo #6D5ACF ΔE 0.050
- French Blue #436BAD ΔE 0.054
- Mid Blue #276AB3 ΔE 0.055
Use #4C64CB 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.