#4B6BBB
Closest named color: French Blue (#436BAD). oklch(54.3% 0.131 265.8), rgb(75, 107, 187).
Aa
White text reads best on this color (5.09:1).
About this color
#4B6BBB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.131 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.025 away. White text reads best on it, at 5.09:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 4.11:1 |
| White text | 5.09:1 |
Values
| HEX | #4B6BBB |
| RGB | rgb(75, 107, 187) |
| HSL | hsl(223, 45%, 51%) |
| OKLCH | oklch(54.3% 0.131 265.8) |
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 #4B6BBB | 5.09:1 | AA | Lc -80.4 | Fine for body text |
| Black text on #4B6BBB | 4.11:1 | AA large text | Lc 29.1 | Dividers and decoration only |
| #4B6BBB text on white | 5.09:1 | AA | Lc 75.0 | Content text, not long reading |
| #4B6BBB text on black | 4.11:1 | AA large text | Lc -26.8 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CFD9EF
oklch(88.4% 0.032 266.1)
-
Step 300
300
#AFC1E8
oklch(81% 0.059 265.6)
-
Step 400
400
#859FDC
oklch(70.6% 0.095 266.3)
-
Step 500
500
#6787D2
oklch(63.2% 0.119 265.6)
-
Step 600
600 (this color)
#4B6BBB
oklch(54.3% 0.131 265.8)
-
Step 700
700
#405CA5
oklch(49% 0.122 266.2)
-
Step 800
800
#354C86
oklch(42.8% 0.1 266)
-
Step 900
900
#2E406B
oklch(37.8% 0.077 265.7)
-
Step 950
950
#1B253F
oklch(26.9% 0.051 267)
#4B6BBB 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) | #4773BE | 0.021 |
| Deuteranopia (no green cones) | #3869B9 | 0.022 |
| Tritanopia (no blue cones) | #007D8A | 0.114 |
| Achromatopsia (no color) | #6E6E6E | 0.131 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B6BBB
#4B6BBB
oklch(54.3% 0.131 265.8)
- #8C6A00
#8C6A00
oklch(54.3% 0.111 86.4)
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 #4B6BBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.025
- Mid Blue #276AB3 ΔE 0.037
- Windows Blue #3778BF ΔE 0.037
- Flat Blue #3C73A8 ΔE 0.044
- Muted Blue #3B719F ΔE 0.054
- Iris #6258C4 ΔE 0.057
- Dark Periwinkle #665FD1 ΔE 0.059
- Nice Blue #107AB0 ΔE 0.060
Use #4B6BBB 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.