#4663DC
Closest named color: Royal Blue (#4169E1). oklch(54.7% 0.187 269.1), rgb(70, 99, 220).
Aa
White text reads best on this color (5.14:1).
About this color
#4663DC is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.187 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.016 away. White text reads best on it, at 5.14:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.187) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.07:1 |
| White text | 5.14:1 |
Values
| HEX | #4663DC |
| RGB | rgb(70, 99, 220) |
| HSL | hsl(228, 68%, 57%) |
| OKLCH | oklch(54.7% 0.187 269.1) |
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 #4663DC | 5.14:1 | AA | Lc -80.4 | Fine for body text |
| Black text on #4663DC | 4.07:1 | AA large text | Lc 29.0 | Dividers and decoration only |
| #4663DC text on white | 5.14:1 | AA | Lc 75.0 | Fine for body text |
| #4663DC text on black | 4.07:1 | AA large text | Lc -26.7 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CCD9F9
oklch(88.6% 0.046 267.9)
-
Step 300
300
#AABFF8
oklch(80.9% 0.084 268.8)
-
Step 400
400
#7E9BF5
oklch(70.6% 0.136 269.2)
-
Step 500
500
#6080F1
oklch(63.2% 0.173 269.1)
-
Step 600
600 (this color)
#4663DC
oklch(54.7% 0.187 269.1)
-
Step 700
700
#3A54C2
oklch(49.2% 0.174 269)
-
Step 800
800
#30459D
oklch(42.7% 0.145 269.2)
-
Step 900
900
#2A3B7C
oklch(37.6% 0.112 269.4)
-
Step 950
950
#182349
oklch(26.9% 0.072 269)
#4663DC 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) | #0074E0 | 0.051 |
| Deuteranopia (no green cones) | #0067DA | 0.041 |
| Tritanopia (no blue cones) | #008096 | 0.152 |
| Achromatopsia (no color) | #6D6D6D | 0.188 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4663DC
#4663DC
oklch(54.7% 0.187 269.1)
- #8B6C00
#8B6C00
oklch(54.7% 0.112 88.7)
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 #4663DC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.016
- Warm Blue #4B57DB ΔE 0.027
- Neon Blue #4361EE ΔE 0.028
- Dark Periwinkle #665FD1 ΔE 0.044
- Azul #1D5DEC ΔE 0.045
- Cerulean Blue #056EEE ΔE 0.047
- Slate Blue #6A5ACD ΔE 0.054
- Iris #6258C4 ΔE 0.054
Use #4663DC 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.