#3746B8
Closest named color: Blue Blue (#2242C7). oklch(45.5% 0.179 271.5), rgb(55, 70, 184).
Aa
White text reads best on this color (7.69:1).
About this color
#3746B8 is a medium-dark, vivid blue. In OKLCH its lightness is 46%, its chroma 0.179 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.034 away. White text reads best on it, at 7.69:1.
| Hue family | Blues |
| Lightness | medium-dark (46%) |
| Chroma | vivid (0.179) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.73:1 |
| White text | 7.69:1 |
Values
| HEX | #3746B8 |
| RGB | rgb(55, 70, 184) |
| HSL | hsl(233, 54%, 47%) |
| OKLCH | oklch(45.5% 0.179 271.5) |
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 #3746B8 | 7.69:1 | AAA | Lc -91.0 | Preferred for body text |
| Black text on #3746B8 | 2.73:1 | Fails | Lc 17.9 | Dividers and decoration only |
| #3746B8 text on white | 7.69:1 | AAA | Lc 86.2 | Fine for body text |
| #3746B8 text on black | 2.73:1 | Fails | Lc -15.9 | 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 800.
-
Step 50
50
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2E9FF
oklch(93.5% 0.031 271.7)
-
Step 200
200
#CCD8FF
oklch(88.6% 0.055 271.8)
-
Step 300
300
#AABDFF
oklch(80.8% 0.096 271.7)
-
Step 400
400
#7F98FF
oklch(70.6% 0.153 271.7)
-
Step 500
500
#617AFF
oklch(63% 0.198 271.6)
-
Step 600
600
#495BF8
oklch(55.7% 0.232 271.4)
-
Step 700
700
#3C49D8
oklch(49.2% 0.215 271.6)
-
Step 800
800 (this color)
#3746B8
oklch(45.5% 0.179 271.5)
-
Step 900
900
#2A368A
oklch(37.7% 0.139 271.8)
-
Step 950
950
#182151
oklch(27.1% 0.088 271.3)
#3746B8 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) | #0059BC | 0.051 |
| Deuteranopia (no green cones) | #004DB6 | 0.038 |
| Tritanopia (no blue cones) | #006378 | 0.144 |
| Achromatopsia (no color) | #535353 | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3746B8
#3746B8
oklch(45.5% 0.179 271.5)
- #6A5400
#6A5400
oklch(45.5% 0.093 91.2)
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 #3746B8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.034
- Majorelle Blue #3F37C9 ΔE 0.039
- Blue With A Hint Of Purple #533CC6 ΔE 0.047
- Sapphire #2138AB ΔE 0.050
- Blurple #5539CC ΔE 0.056
- Blueberry #464196 ΔE 0.058
- Bluey Purple #6241C7 ΔE 0.068
- Cobalt #1E488F ΔE 0.073
Use #3746B8 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.