#3774AF
Closest named color: Flat Blue (#3C73A8). oklch(54.6% 0.112 249.9), rgb(55, 116, 175).
Aa
White text reads best on this color (4.90:1).
About this color
#3774AF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 55%, its chroma 0.112 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.011 away. White text reads best on it, at 4.90:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 4.27:1 |
| White text | 4.90:1 |
Values
| HEX | #3774AF |
| RGB | rgb(55, 116, 175) |
| HSL | hsl(210, 52%, 45%) |
| OKLCH | oklch(54.6% 0.112 249.9) |
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 #3774AF | 4.90:1 | AA | Lc -79.2 | Fine for body text |
| Black text on #3774AF | 4.27:1 | AA large text | Lc 30.3 | Non-text elements, placeholder text |
| #3774AF text on white | 4.90:1 | AA | Lc 73.7 | Content text, not long reading |
| #3774AF text on black | 4.27:1 | AA large text | Lc -28.0 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CCDBEB
oklch(88.5% 0.027 249.9)
-
Step 300
300
#A9C4E1
oklch(81% 0.051 250.3)
-
Step 400
400
#7AA5D1
oklch(70.7% 0.08 249.6)
-
Step 500
500
#568EC5
oklch(63.1% 0.102 249.3)
-
Step 600
600 (this color)
#3774AF
oklch(54.6% 0.112 249.9)
-
Step 700
700
#2C6499
oklch(49.2% 0.104 249.7)
-
Step 800
800
#26527C
oklch(42.8% 0.085 249.5)
-
Step 900
900
#244464
oklch(37.8% 0.067 250)
-
Step 950
950
#15283A
oklch(27% 0.042 248.4)
#3774AF 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) | #5A77B2 | 0.039 |
| Deuteranopia (no green cones) | #496BAE | 0.028 |
| Tritanopia (no blue cones) | #008289 | 0.086 |
| Achromatopsia (no color) | #717171 | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3774AF
#3774AF
oklch(54.6% 0.112 249.9)
- #9A6312
#9A6312
oklch(54.7% 0.113 69.7)
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 #3774AF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.011
- Nice Blue #107AB0 ΔE 0.024
- Muted Blue #3B719F ΔE 0.025
- Windows Blue #3778BF ΔE 0.026
- French Blue #436BAD ΔE 0.026
- Dull Blue #49759C ΔE 0.034
- Mid Blue #276AB3 ΔE 0.035
- Cerulean #457B9D ΔE 0.041
Use #3774AF 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.