#3752BB
Closest named color: Blue Blue (#2242C7). oklch(48.1% 0.168 268.4), rgb(55, 82, 187).
Aa
White text reads best on this color (6.80:1).
About this color
#3752BB is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.168 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.049 away. White text reads best on it, at 6.80:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.168) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.08:1 |
| White text | 6.80:1 |
Values
| HEX | #3752BB |
| RGB | rgb(55, 82, 187) |
| HSL | hsl(228, 55%, 47%) |
| OKLCH | oklch(48.1% 0.168 268.4) |
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 #3752BB | 6.80:1 | AA | Lc -88.1 | Fine for body text |
| Black text on #3752BB | 3.08:1 | AA large text | Lc 21.0 | Dividers and decoration only |
| #3752BB text on white | 6.80:1 | AA | Lc 83.0 | Fine for body text |
| #3752BB text on black | 3.08:1 | AA large text | Lc -18.9 | 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 700.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CCD9F8
oklch(88.5% 0.045 267.4)
-
Step 300
300
#AABFF6
oklch(80.8% 0.082 268.3)
-
Step 400
400
#7E9CF2
oklch(70.6% 0.131 268.4)
-
Step 500
500
#5F81ED
oklch(63.1% 0.166 268.2)
-
Step 600
600
#4867DC
oklch(55.6% 0.182 268.6)
-
Step 700
700 (this color)
#3752BB
oklch(48.1% 0.168 268.4)
-
Step 800
800
#30469A
oklch(42.6% 0.14 268.7)
-
Step 900
900
#2A3C7B
oklch(37.7% 0.109 268.7)
-
Step 950
950
#182448
oklch(27.1% 0.069 267.8)
#3752BB 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) | #0061BF | 0.044 |
| Deuteranopia (no green cones) | #0055B9 | 0.033 |
| Tritanopia (no blue cones) | #006C7E | 0.137 |
| Achromatopsia (no color) | #5B5B5B | 0.168 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3752BB
#3752BB
oklch(48.1% 0.168 268.4)
- #745A00
#745A00
oklch(48.1% 0.098 89.1)
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 #3752BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.049
- Warm Blue #4B57DB ΔE 0.058
- Blue With A Hint Of Purple #533CC6 ΔE 0.059
- Majorelle Blue #3F37C9 ΔE 0.060
- Iris #6258C4 ΔE 0.064
- Mid Blue #276AB3 ΔE 0.066
- Blurple #5539CC ΔE 0.067
- Bluey Purple #6241C7 ΔE 0.070
Use #3752BB 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.