#4B7BBB
Closest named color: Windows Blue (#3778BF). oklch(57.8% 0.112 256.1), rgb(75, 123, 187).
Aa
Black text reads best on this color (4.84:1).
About this color
#4B7BBB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 58%, its chroma 0.112 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.022 away. Black text reads best on it, at 4.84:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.84:1 |
| White text | 4.32:1 |
Values
| HEX | #4B7BBB |
| RGB | rgb(75, 123, 187) |
| HSL | hsl(214, 45%, 51%) |
| OKLCH | oklch(57.8% 0.112 256.1) |
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 #4B7BBB | 4.32:1 | AA large text | Lc -75.3 | Fine for body text |
| Black text on #4B7BBB | 4.84:1 | AA | Lc 34.3 | Non-text elements, placeholder text |
| #4B7BBB text on white | 4.32:1 | AA large text | Lc 69.8 | Content text, not long reading |
| #4B7BBB text on black | 4.84:1 | AA | Lc -31.9 | Non-text elements, placeholder text |
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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CDDAEC
oklch(88.4% 0.029 256.5)
-
Step 300
300
#ACC3E2
oklch(81% 0.051 255.9)
-
Step 400
400
#7FA3D3
oklch(70.7% 0.081 255.8)
-
Step 500
500
#5F8BC7
oklch(63% 0.103 256.4)
-
Step 600
600 (this color)
#4B7BBB
oklch(57.8% 0.112 256.1)
-
Step 700
700
#36619B
oklch(49% 0.105 256.4)
-
Step 800
800
#2D507D
oklch(42.7% 0.086 255.4)
-
Step 900
900
#294265
oklch(37.6% 0.068 257)
-
Step 950
950
#18273B
oklch(27% 0.043 255.9)
#4B7BBB 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) | #607FBE | 0.028 |
| Deuteranopia (no green cones) | #5175BA | 0.017 |
| Tritanopia (no blue cones) | #008A92 | 0.096 |
| Achromatopsia (no color) | #797979 | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B7BBB
#4B7BBB
oklch(57.8% 0.112 256.1)
- #9F6F1A
#9F6F1A
oklch(57.7% 0.112 76)
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 #4B7BBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.022
- Steel Blue #4682B4 ΔE 0.025
- Cool Blue #4984B8 ΔE 0.027
- Off Blue #5684AE ΔE 0.039
- Flat Blue #3C73A8 ΔE 0.039
- Nice Blue #107AB0 ΔE 0.044
- Water Blue #0E87CC ΔE 0.046
- Dusty Blue #5A86AD ΔE 0.047
Use #4B7BBB 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.