#3741A6
Closest named color: Blueberry (#464196). oklch(43% 0.161 273.3), rgb(55, 65, 166).
Aa
White text reads best on this color (8.50:1).
About this color
#3741A6 is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.161 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.034 away. White text reads best on it, at 8.50:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.161) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.46:1 |
| White text | 8.50:1 |
Values
| HEX | #3741A6 |
| RGB | rgb(55, 65, 166) |
| HSL | hsl(235, 50%, 43%) |
| OKLCH | oklch(43% 0.161 273.3) |
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 #3741A6 | 8.50:1 | AAA | Lc -93.4 | Preferred for body text |
| Black text on #3741A6 | 2.46:1 | Fails | Lc 15.2 | Dividers and decoration only |
| #3741A6 text on white | 8.50:1 | AAA | Lc 88.8 | Fine for body text |
| #3741A6 text on black | 2.46:1 | Fails | Lc -13.4 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E4E9FD
oklch(93.6% 0.028 274.7)
-
Step 200
200
#CDD8FD
oklch(88.6% 0.052 272.2)
-
Step 300
300
#ADBDFE
oklch(81% 0.094 273.5)
-
Step 400
400
#8398FD
oklch(70.8% 0.149 273.2)
-
Step 500
500
#677AFB
oklch(63.1% 0.191 273.3)
-
Step 600
600
#515FEB
oklch(55.7% 0.209 273.2)
-
Step 700
700
#424DCC
oklch(49.1% 0.194 273.1)
-
Step 800
800 (this color)
#3741A6
oklch(43% 0.161 273.3)
-
Step 900
900
#2E3883
oklch(37.8% 0.125 273.1)
-
Step 950
950
#1B214C
oklch(26.9% 0.079 273.9)
#3741A6 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) | #0052A9 | 0.051 |
| Deuteranopia (no green cones) | #0048A4 | 0.042 |
| Tritanopia (no blue cones) | #005A6D | 0.132 |
| Achromatopsia (no color) | #4D4D4D | 0.161 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3741A6
#3741A6
oklch(43% 0.161 273.3)
- #604E00
#604E00
oklch(43% 0.088 93.6)
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 #3741A6, closest first.
No curated palette has a color within ΔE 0.04 of #3741A6.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.034
- Sapphire #2138AB ΔE 0.037
- Cobalt #1E488F ΔE 0.050
- Dark Slate Blue #483D8B ΔE 0.051
- Blue Blue #2242C7 ΔE 0.057
- Majorelle Blue #3F37C9 ΔE 0.059
- Blue With A Hint Of Purple #533CC6 ΔE 0.066
- Dusk Blue #26538D ΔE 0.067
Use #3741A6 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.