#3751AF
Closest named color: Blueberry (#464196). oklch(46.9% 0.153 268.3), rgb(55, 81, 175).
Aa
White text reads best on this color (7.09:1).
About this color
#3751AF is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.153 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.056 away. White text reads best on it, at 7.09:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.153) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.95:1 |
| White text | 7.09:1 |
Values
| HEX | #3751AF |
| RGB | rgb(55, 81, 175) |
| HSL | hsl(227, 52%, 45%) |
| OKLCH | oklch(46.9% 0.153 268.3) |
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 #3751AF | 7.09:1 | AAA | Lc -89.2 | Fine for body text |
| Black text on #3751AF | 2.95:1 | Fails | Lc 19.8 | Dividers and decoration only |
| #3751AF text on white | 7.09:1 | AAA | Lc 84.2 | Fine for body text |
| #3751AF text on black | 2.95:1 | Fails | Lc -17.7 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E4EAF9
oklch(93.7% 0.021 268.4)
-
Step 200
200
#CDD9F5
oklch(88.5% 0.041 267.1)
-
Step 300
300
#ACBFF1
oklch(80.8% 0.074 268.5)
-
Step 400
400
#819DEB
oklch(70.7% 0.119 268.2)
-
Step 500
500
#6383E4
oklch(63.2% 0.15 268.2)
-
Step 600
600
#4B6AD2
oklch(55.6% 0.164 268.2)
-
Step 700
700 (this color)
#3751AF
oklch(46.9% 0.153 268.3)
-
Step 800
800
#324893
oklch(42.6% 0.126 268.3)
-
Step 900
900
#2C3D75
oklch(37.7% 0.098 268.7)
-
Step 950
950
#192445
oklch(26.9% 0.063 268.1)
#3751AF 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) | #0F5EB2 | 0.039 |
| Deuteranopia (no green cones) | #0053AD | 0.035 |
| Tritanopia (no blue cones) | #006778 | 0.124 |
| Achromatopsia (no color) | #585858 | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3751AF
#3751AF
oklch(46.9% 0.153 268.3)
- #715700
#715700
oklch(47% 0.096 88.5)
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 #3751AF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.056
- Denim Blue #3B5B92 ΔE 0.058
- Blue Blue #2242C7 ΔE 0.058
- Dusk Blue #26538D ΔE 0.060
- Cobalt #1E488F ΔE 0.064
- Twilight #4E518B ΔE 0.065
- Mid Blue #276AB3 ΔE 0.066
- Dusky Blue #475F94 ΔE 0.067
Use #3751AF 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.