#4770BB
Closest named color: Windows Blue (#3778BF). oklch(55.2% 0.126 261.5), rgb(71, 112, 187).
Aa
White text reads best on this color (4.88:1).
About this color
#4770BB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.126 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.024 away. White text reads best on it, at 4.88:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.30:1 |
| White text | 4.88:1 |
Values
| HEX | #4770BB |
| RGB | rgb(71, 112, 187) |
| HSL | hsl(219, 46%, 51%) |
| OKLCH | oklch(55.2% 0.126 261.5) |
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 #4770BB | 4.88:1 | AA | Lc -79.0 | Fine for body text |
| Black text on #4770BB | 4.30:1 | AA large text | Lc 30.5 | Non-text elements, placeholder text |
| #4770BB text on white | 4.88:1 | AA | Lc 73.6 | Content text, not long reading |
| #4770BB text on black | 4.30:1 | AA large text | Lc -28.1 | 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
#F3F6FB
oklch(97.2% 0.007 260.7)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CEDAEF
oklch(88.6% 0.032 261.7)
-
Step 300
300
#ADC2E6
oklch(81% 0.056 261.2)
-
Step 400
400
#81A1DA
oklch(70.7% 0.091 261.7)
-
Step 500
500
#6189CF
oklch(63.1% 0.115 261)
-
Step 600
600 (this color)
#4770BB
oklch(55.2% 0.126 261.5)
-
Step 700
700
#3A5FA3
oklch(49.2% 0.117 261.6)
-
Step 800
800
#304E84
oklch(42.8% 0.097 261.3)
-
Step 900
900
#2A416A
oklch(37.7% 0.076 261.3)
-
Step 950
950
#19263E
oklch(27% 0.049 262)
#4770BB 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) | #4F77BE | 0.022 |
| Deuteranopia (no green cones) | #3F6CB9 | 0.015 |
| Tritanopia (no blue cones) | #00818C | 0.107 |
| Achromatopsia (no color) | #717171 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4770BB
#4770BB
oklch(55.2% 0.126 261.5)
- #936A00
#936A00
oklch(55.2% 0.114 81.8)
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 #4770BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.024
- French Blue #436BAD ΔE 0.025
- Flat Blue #3C73A8 ΔE 0.035
- Mid Blue #276AB3 ΔE 0.037
- Muted Blue #3B719F ΔE 0.048
- Nice Blue #107AB0 ΔE 0.048
- Dull Blue #49759C ΔE 0.054
- Steel Blue #4682B4 ΔE 0.055
Use #4770BB 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.