#4D74CB
Closest named color: Windows Blue (#3778BF). oklch(57.3% 0.141 264.2), rgb(77, 116, 203).
Aa
Black text reads best on this color (4.67:1).
About this color
#4D74CB is a medium-dark, vivid blue. In OKLCH its lightness is 57%, its chroma 0.141 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.031 away. Black text reads best on it, at 4.67:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | vivid (0.141) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.67:1 |
| White text | 4.49:1 |
Values
| HEX | #4D74CB |
| RGB | rgb(77, 116, 203) |
| HSL | hsl(221, 55%, 55%) |
| OKLCH | oklch(57.3% 0.141 264.2) |
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 #4D74CB | 4.49:1 | AA large text | Lc -76.4 | Fine for body text |
| Black text on #4D74CB | 4.67:1 | AA | Lc 33.1 | Non-text elements, placeholder text |
| #4D74CB text on white | 4.49:1 | AA large text | Lc 70.9 | Content text, not long reading |
| #4D74CB text on black | 4.67:1 | AA | Lc -30.7 | 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
#F2F5FB
oklch(97% 0.009 264.5)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CDD9F1
oklch(88.4% 0.036 264.4)
-
Step 300
300
#ACC1EB
oklch(80.9% 0.064 264.1)
-
Step 400
400
#80A0E1
oklch(70.8% 0.102 263.9)
-
Step 500
500
#6187D8
oklch(63.2% 0.13 264)
-
Step 600
600 (this color)
#4D74CB
oklch(57.3% 0.141 264.2)
-
Step 700
700
#3A5CAA
oklch(49% 0.131 264.4)
-
Step 800
800
#304C8A
oklch(42.8% 0.108 264.1)
-
Step 900
900
#2A406E
oklch(37.8% 0.084 263.6)
-
Step 950
950
#192641
oklch(27.2% 0.054 263.7)
#4D74CB 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) | #4C7DCE | 0.024 |
| Deuteranopia (no green cones) | #3971C9 | 0.023 |
| Tritanopia (no blue cones) | #008895 | 0.121 |
| Achromatopsia (no color) | #777777 | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4D74CB
#4D74CB
oklch(57.3% 0.141 264.2)
- #997100
#997100
oklch(57.3% 0.118 83.9)
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 #4D74CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.031
- Royal Blue #4169E1 ΔE 0.049
- French Blue #436BAD ΔE 0.052
- Water Blue #0E87CC ΔE 0.058
- Cool Blue #4984B8 ΔE 0.058
- Steel Blue #4682B4 ΔE 0.059
- Flat Blue #3C73A8 ΔE 0.059
- Mid Blue #276AB3 ΔE 0.060
Use #4D74CB 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.