#4B6ACB
Closest named color: Royal Blue (#4169E1). oklch(55.1% 0.154 267.8), rgb(75, 106, 203).
Aa
White text reads best on this color (4.97:1).
About this color
#4B6ACB is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.154 and its hue 268°. 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 4.97:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.22:1 |
| White text | 4.97:1 |
Values
| HEX | #4B6ACB |
| RGB | rgb(75, 106, 203) |
| HSL | hsl(225, 55%, 55%) |
| OKLCH | oklch(55.1% 0.154 267.8) |
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 #4B6ACB | 4.97:1 | AA | Lc -79.5 | Fine for body text |
| Black text on #4B6ACB | 4.22:1 | AA large text | Lc 30.0 | Dividers and decoration only |
| #4B6ACB text on white | 4.97:1 | AA | Lc 74.1 | Content text, not long reading |
| #4B6ACB text on black | 4.22:1 | AA large text | Lc -27.6 | 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
#CED9F4
oklch(88.5% 0.039 267.9)
-
Step 300
300
#ADC0EE
oklch(80.9% 0.069 267.3)
-
Step 400
400
#829EE6
oklch(70.7% 0.111 267.3)
-
Step 500
500
#6484DF
oklch(63.1% 0.142 267.6)
-
Step 600
600 (this color)
#4B6ACB
oklch(55.1% 0.154 267.8)
-
Step 700
700
#3E59B1
oklch(49.1% 0.143 268)
-
Step 800
800
#33498F
oklch(42.6% 0.119 268)
-
Step 900
900
#2C3E72
oklch(37.7% 0.092 267.5)
-
Step 950
950
#1A2543
oklch(27.1% 0.058 267.3)
#4B6ACB 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) | #3876CF | 0.033 |
| Deuteranopia (no green cones) | #1F6AC9 | 0.037 |
| Tritanopia (no blue cones) | #008091 | 0.130 |
| Achromatopsia (no color) | #707070 | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B6ACB
#4B6ACB
oklch(55.1% 0.154 267.8)
- #8D6D00
#8D6D00
oklch(55.1% 0.113 88.2)
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 #4B6ACB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.035
- Dark Periwinkle #665FD1 ΔE 0.043
- Windows Blue #3778BF ΔE 0.047
- French Blue #436BAD ΔE 0.049
- Iris #6258C4 ΔE 0.050
- Mid Blue #276AB3 ΔE 0.052
- Slate Blue #6A5ACD ΔE 0.054
- Warm Blue #4B57DB ΔE 0.054
Use #4B6ACB 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.