#4A78BF
Closest named color: Windows Blue (#3778BF). oklch(57.3% 0.121 258.8), rgb(74, 120, 191).
Aa
Black text reads best on this color (4.73:1).
About this color
#4A78BF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.121 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.017 away. Black text reads best on it, at 4.73:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.73:1 |
| White text | 4.43:1 |
Values
| HEX | #4A78BF |
| RGB | rgb(74, 120, 191) |
| HSL | hsl(216, 48%, 52%) |
| OKLCH | oklch(57.3% 0.121 258.8) |
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 #4A78BF | 4.43:1 | AA large text | Lc -76.1 | Fine for body text |
| Black text on #4A78BF | 4.73:1 | AA | Lc 33.5 | Non-text elements, placeholder text |
| #4A78BF text on white | 4.43:1 | AA large text | Lc 70.6 | Content text, not long reading |
| #4A78BF text on black | 4.73:1 | AA | Lc -31.1 | 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
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CDDAEE
oklch(88.5% 0.031 258.9)
-
Step 300
300
#ACC2E4
oklch(80.9% 0.054 259)
-
Step 400
400
#7FA2D7
oklch(70.7% 0.087 258.5)
-
Step 500
500
#5F8ACD
oklch(63.1% 0.112 259)
-
Step 600
600 (this color)
#4A78BF
oklch(57.3% 0.121 258.8)
-
Step 700
700
#3760A0
oklch(49.1% 0.113 259)
-
Step 800
800
#2E4F81
oklch(42.8% 0.092 258.5)
-
Step 900
900
#294268
oklch(37.8% 0.072 258.5)
-
Step 950
950
#18273D
oklch(27.1% 0.046 257.8)
#4A78BF 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) | #5A7EC2 | 0.026 |
| Deuteranopia (no green cones) | #4A73BE | 0.014 |
| Tritanopia (no blue cones) | #008892 | 0.103 |
| Achromatopsia (no color) | #787878 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4A78BF
#4A78BF
oklch(57.3% 0.121 258.8)
- #9E6E00
#9E6E00
oklch(57.3% 0.119 78.4)
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 #4A78BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.017
- Steel Blue #4682B4 ΔE 0.036
- Cool Blue #4984B8 ΔE 0.038
- Flat Blue #3C73A8 ΔE 0.041
- French Blue #436BAD ΔE 0.044
- Nice Blue #107AB0 ΔE 0.047
- Water Blue #0E87CC ΔE 0.048
- Off Blue #5684AE ΔE 0.051
Use #4A78BF 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.