#4F70BB
Closest named color: Windows Blue (#3778BF). oklch(55.6% 0.123 264.8), rgb(79, 112, 187).
Aa
White text reads best on this color (4.80:1).
About this color
#4F70BB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.123 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.028 away. White text reads best on it, at 4.80:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.36:1 |
| White text | 4.80:1 |
Values
| HEX | #4F70BB |
| RGB | rgb(79, 112, 187) |
| HSL | hsl(222, 44%, 52%) |
| OKLCH | oklch(55.6% 0.123 264.8) |
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 #4F70BB | 4.80:1 | AA | Lc -78.6 | Fine for body text |
| Black text on #4F70BB | 4.36:1 | AA large text | Lc 30.9 | Non-text elements, placeholder text |
| #4F70BB text on white | 4.80:1 | AA | Lc 73.2 | Content text, not long reading |
| #4F70BB text on black | 4.36:1 | AA large text | Lc -28.5 | 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
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#CFD9EE
oklch(88.4% 0.031 265.3)
-
Step 300
300
#AFC1E5
oklch(80.9% 0.055 264.2)
-
Step 400
400
#85A0D9
oklch(70.7% 0.089 264.7)
-
Step 500
500
#6787CE
oklch(63% 0.114 264.9)
-
Step 600
600 (this color)
#4F70BB
oklch(55.6% 0.123 264.8)
-
Step 700
700
#405DA1
oklch(49% 0.115 265.1)
-
Step 800
800
#354D83
oklch(42.8% 0.095 264.6)
-
Step 900
900
#2E4069
oklch(37.7% 0.074 265.1)
-
Step 950
950
#1B263D
oklch(27% 0.046 264.1)
#4F70BB 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) | #5077BE | 0.019 |
| Deuteranopia (no green cones) | #426EB9 | 0.016 |
| Tritanopia (no blue cones) | #00818C | 0.111 |
| Achromatopsia (no color) | #727272 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4F70BB
#4F70BB
oklch(55.6% 0.123 264.8)
- #926D00
#926D00
oklch(55.7% 0.114 85)
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 #4F70BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.028
- French Blue #436BAD ΔE 0.029
- Flat Blue #3C73A8 ΔE 0.039
- Mid Blue #276AB3 ΔE 0.045
- Muted Blue #3B719F ΔE 0.051
- Steel Blue #4682B4 ΔE 0.054
- Nice Blue #107AB0 ΔE 0.054
- Dull Blue #49759C ΔE 0.055
Use #4F70BB 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.