#4A78AA
Closest named color: Flat Blue (#3C73A8). oklch(56.2% 0.093 251.6), rgb(74, 120, 170).
Aa
White text reads best on this color (4.60:1).
About this color
#4A78AA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.093 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.022 away. White text reads best on it, at 4.60:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 4.55:1 |
| White text | 4.60:1 |
Values
| HEX | #4A78AA |
| RGB | rgb(74, 120, 170) |
| HSL | hsl(211, 39%, 48%) |
| OKLCH | oklch(56.2% 0.093 251.6) |
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 #4A78AA | 4.60:1 | AA | Lc -77.3 | Fine for body text |
| Black text on #4A78AA | 4.55:1 | AA | Lc 32.2 | Non-text elements, placeholder text |
| #4A78AA text on white | 4.60:1 | AA | Lc 71.9 | Content text, not long reading |
| #4A78AA text on black | 4.55:1 | AA | Lc -29.8 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF2
oklch(93.7% 0.012 248)
-
Step 200
200
#CEDBE8
oklch(88.6% 0.023 248.1)
-
Step 300
300
#ADC3DB
oklch(80.8% 0.042 250.6)
-
Step 400
400
#82A4CA
oklch(70.7% 0.067 251.6)
-
Step 500
500
#628DBC
oklch(63.1% 0.086 251.4)
-
Step 600
600 (this color)
#4A78AA
oklch(56.2% 0.093 251.6)
-
Step 700
700
#3A6390
oklch(49% 0.086 252)
-
Step 800
800
#305175
oklch(42.7% 0.072 251.8)
-
Step 900
900
#2B435E
oklch(37.6% 0.055 252.2)
-
Step 950
950
#192837
oklch(27.1% 0.035 249.2)
#4A78AA 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) | #637AAC | 0.031 |
| Deuteranopia (no green cones) | #5771A9 | 0.023 |
| Tritanopia (no blue cones) | #00838A | 0.080 |
| Achromatopsia (no color) | #757575 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4A78AA
#4A78AA
oklch(56.2% 0.093 251.6)
- #976B31
#976B31
oklch(56.2% 0.093 71.3)
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 #4A78AA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.022
- Dull Blue #49759C ΔE 0.022
- Cerulean #457B9D ΔE 0.025
- Stormy Blue #507B9C ΔE 0.027
- Steel Blue #4682B4 ΔE 0.029
- Muted Blue #3B719F ΔE 0.031
- Windows Blue #3778BF ΔE 0.036
- Cool Blue #4984B8 ΔE 0.036
Use #4A78AA 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.