#3744B4
Closest named color: Blue Blue (#2242C7). oklch(44.8% 0.176 272.1), rgb(55, 68, 180).
Aa
White text reads best on this color (7.92:1).
About this color
#3744B4 is a dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.176 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.037 away. White text reads best on it, at 7.92:1.
| Hue family | Blues |
| Lightness | dark (45%) |
| Chroma | vivid (0.176) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.64:1 |
| White text | 7.92:1 |
Values
| HEX | #3744B4 |
| RGB | rgb(55, 68, 180) |
| HSL | hsl(234, 53%, 46%) |
| OKLCH | oklch(44.8% 0.176 272.1) |
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 #3744B4 | 7.92:1 | AAA | Lc -91.7 | Preferred for body text |
| Black text on #3744B4 | 2.64:1 | Fails | Lc 17.1 | Dividers and decoration only |
| #3744B4 text on white | 7.92:1 | AAA | Lc 87.0 | Fine for body text |
| #3744B4 text on black | 2.64:1 | Fails | Lc -15.1 | 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
#E3E9FF
oklch(93.6% 0.03 273.6)
-
Step 200
200
#CCD8FF
oklch(88.6% 0.055 271.8)
-
Step 300
300
#ABBDFF
oklch(80.9% 0.096 272.3)
-
Step 400
400
#8098FF
oklch(70.7% 0.153 272.1)
-
Step 500
500
#637AFF
oklch(63.2% 0.198 272.1)
-
Step 600
600
#4B5BF6
oklch(55.6% 0.229 272)
-
Step 700
700
#3D49D6
oklch(49% 0.213 271.9)
-
Step 800
800 (this color)
#3744B4
oklch(44.8% 0.176 272.1)
-
Step 900
900
#2B3689
oklch(37.7% 0.138 272.2)
-
Step 950
950
#192150
oklch(27.1% 0.086 272.1)
#3744B4 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) | #0057B8 | 0.052 |
| Deuteranopia (no green cones) | #004BB2 | 0.039 |
| Tritanopia (no blue cones) | #006075 | 0.142 |
| Achromatopsia (no color) | #515151 | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3744B4
#3744B4
oklch(44.8% 0.176 272.1)
- #675200
#675200
oklch(44.7% 0.091 91.6)
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 #3744B4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.037
- Majorelle Blue #3F37C9 ΔE 0.041
- Sapphire #2138AB ΔE 0.044
- Blue With A Hint Of Purple #533CC6 ΔE 0.050
- Blueberry #464196 ΔE 0.052
- Blurple #5539CC ΔE 0.059
- Cobalt #1E488F ΔE 0.067
- Dark Slate Blue #483D8B ΔE 0.071
Use #3744B4 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.