#4C70CC
Closest named color: Windows Blue (#3778BF). oklch(56.5% 0.148 265.8), rgb(76, 112, 204).
Aa
White text reads best on this color (4.66:1).
About this color
#4C70CC is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.148 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.037 away. White text reads best on it, at 4.66:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.148) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.49:1 |
| White text | 4.66:1 |
Values
| HEX | #4C70CC |
| RGB | rgb(76, 112, 204) |
| HSL | hsl(223, 56%, 55%) |
| OKLCH | oklch(56.5% 0.148 265.8) |
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 #4C70CC | 4.66:1 | AA | Lc -77.6 | Fine for body text |
| Black text on #4C70CC | 4.49:1 | AA large text | Lc 31.9 | Non-text elements, placeholder text |
| #4C70CC text on white | 4.66:1 | AA | Lc 72.2 | Content text, not long reading |
| #4C70CC text on black | 4.49:1 | AA large text | Lc -29.5 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CED9F2
oklch(88.5% 0.036 266.7)
-
Step 300
300
#ACC0ED
oklch(80.8% 0.068 266.1)
-
Step 400
400
#819FE3
oklch(70.7% 0.106 265.6)
-
Step 500
500
#6285DB
oklch(63% 0.136 265.9)
-
Step 600
600 (this color)
#4C70CC
oklch(56.5% 0.148 265.8)
-
Step 700
700
#3B5BAE
oklch(49.1% 0.138 265.7)
-
Step 800
800
#314B8D
oklch(42.8% 0.114 265.7)
-
Step 900
900
#2B3F70
oklch(37.7% 0.088 265.7)
-
Step 950
950
#192542
oklch(27% 0.057 265.8)
#4C70CC 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) | #447ACF | 0.026 |
| Deuteranopia (no green cones) | #2F6FCA | 0.027 |
| Tritanopia (no blue cones) | #008594 | 0.125 |
| Achromatopsia (no color) | #747474 | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4C70CC
#4C70CC
oklch(56.5% 0.148 265.8)
- #947000
#947000
oklch(56.5% 0.116 86.2)
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 #4C70CC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.037
- Royal Blue #4169E1 ΔE 0.041
- French Blue #436BAD ΔE 0.050
- Dark Periwinkle #665FD1 ΔE 0.052
- Mid Blue #276AB3 ΔE 0.056
- Flat Blue #3C73A8 ΔE 0.062
- Iris #6258C4 ΔE 0.063
- Slate Blue #6A5ACD ΔE 0.063
Use #4C70CC 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.