#3647DF
Closest named color: Blue Blue (#2242C7). oklch(49.2% 0.228 270.1), rgb(54, 71, 223).
Aa
White text reads best on this color (6.72:1).
About this color
#3647DF is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.228 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.046 away. White text reads best on it, at 6.72:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.228) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.12:1 |
| White text | 6.72:1 |
Values
| HEX | #3647DF |
| RGB | rgb(54, 71, 223) |
| HSL | hsl(234, 73%, 54%) |
| OKLCH | oklch(49.2% 0.228 270.1) |
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 #3647DF | 6.72:1 | AA | Lc -87.4 | Fine for body text |
| Black text on #3647DF | 3.12:1 | AA large text | Lc 21.8 | Dividers and decoration only |
| #3647DF text on white | 6.72:1 | AA | Lc 82.3 | Fine for body text |
| #3647DF text on black | 3.12:1 | AA large text | Lc -19.6 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2E9FF
oklch(93.5% 0.031 271.7)
-
Step 200
200
#CBD8FF
oklch(88.5% 0.056 270.7)
-
Step 300
300
#A9BEFF
oklch(80.9% 0.095 270.4)
-
Step 400
400
#7C99FF
oklch(70.6% 0.153 270.2)
-
Step 500
500
#5D7BFF
oklch(63% 0.198 270.2)
-
Step 600
600
#4359FF
oklch(55.7% 0.244 270.2)
-
Step 700
700 (this color)
#3647DF
oklch(49.2% 0.228 270.1)
-
Step 800
800
#2C3CB4
oklch(42.8% 0.188 270.1)
-
Step 900
900
#26358E
oklch(37.6% 0.148 270.3)
-
Step 950
950
#162053
oklch(26.9% 0.093 270.5)
#3647DF 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) | #0064E4 | 0.064 |
| Deuteranopia (no green cones) | #0054DC | 0.036 |
| Tritanopia (no blue cones) | #00718D | 0.178 |
| Achromatopsia (no color) | #5C5C5C | 0.228 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3647DF
#3647DF
oklch(49.2% 0.228 270.1)
- #775E00
#775E00
oklch(49.3% 0.101 90.6)
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 #3647DF, closest first.
No curated palette has a color within ΔE 0.04 of #3647DF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.046
- Warm Blue #4B57DB ΔE 0.047
- Majorelle Blue #3F37C9 ΔE 0.048
- Azul #1D5DEC ΔE 0.050
- Blurple #5539CC ΔE 0.056
- Light Royal Blue #3A2EFE ΔE 0.056
- Vibrant Blue #0339F8 ΔE 0.058
- Blue With A Hint Of Purple #533CC6 ΔE 0.058
Use #3647DF 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.