#3745A0
Closest named color: Blueberry (#464196). oklch(43.3% 0.147 272.1), rgb(55, 69, 160).
Aa
White text reads best on this color (8.32:1).
About this color
#3745A0 is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.147 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.027 away. White text reads best on it, at 8.32:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.147) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.52:1 |
| White text | 8.32:1 |
Values
| HEX | #3745A0 |
| RGB | rgb(55, 69, 160) |
| HSL | hsl(232, 49%, 42%) |
| OKLCH | oklch(43.3% 0.147 272.1) |
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 #3745A0 | 8.32:1 | AAA | Lc -93.0 | Preferred for body text |
| Black text on #3745A0 | 2.52:1 | Fails | Lc 15.6 | Dividers and decoration only |
| #3745A0 text on white | 8.32:1 | AAA | Lc 88.4 | Fine for body text |
| #3745A0 text on black | 2.52:1 | Fails | Lc -13.8 | Not readable |
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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E4E9FB
oklch(93.6% 0.025 273.5)
-
Step 200
200
#CED8FA
oklch(88.5% 0.048 272.4)
-
Step 300
300
#ADBEF9
oklch(81% 0.086 271.9)
-
Step 400
400
#839AF6
oklch(70.8% 0.137 271.9)
-
Step 500
500
#667DF2
oklch(63% 0.176 272.1)
-
Step 600
600
#5063E1
oklch(55.6% 0.191 272.2)
-
Step 700
700
#4151C3
oklch(49% 0.178 272.1)
-
Step 800
800 (this color)
#3745A0
oklch(43.3% 0.147 272.1)
-
Step 900
900
#2E3A7D
oklch(37.7% 0.114 272.2)
-
Step 950
950
#1B2249
oklch(26.9% 0.072 272.9)
#3745A0 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) | #0053A3 | 0.047 |
| Deuteranopia (no green cones) | #00499E | 0.040 |
| Tritanopia (no blue cones) | #005B6B | 0.124 |
| Achromatopsia (no color) | #4E4E4E | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3745A0
#3745A0
oklch(43.3% 0.147 272.1)
- #624E00
#624E00
oklch(43.2% 0.088 91.8)
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 #3745A0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.027
- Cobalt #1E488F ΔE 0.040
- Dark Slate Blue #483D8B ΔE 0.044
- Sapphire #2138AB ΔE 0.047
- Dusk Blue #26538D ΔE 0.054
- Twilight #4E518B ΔE 0.062
- Light Navy #155084 ΔE 0.065
- Blue Blue #2242C7 ΔE 0.066
Use #3745A0 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.