#3674E5
Closest named color: Royal Blue (#4169E1). oklch(58.1% 0.184 261.2), rgb(54, 116, 229).
Aa
Black text reads best on this color (4.78:1).
About this color
#3674E5 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.184 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.027 away. Black text reads best on it, at 4.78:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.184) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.78:1 |
| White text | 4.38:1 |
Values
| HEX | #3674E5 |
| RGB | rgb(54, 116, 229) |
| HSL | hsl(219, 77%, 55%) |
| OKLCH | oklch(58.1% 0.184 261.2) |
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 #3674E5 | 4.38:1 | AA large text | Lc -75.4 | Fine for body text |
| Black text on #3674E5 | 4.78:1 | AA | Lc 34.1 | Non-text elements, placeholder text |
| #3674E5 text on white | 4.38:1 | AA large text | Lc 69.9 | Content text, not long reading |
| #3674E5 text on black | 4.78:1 | AA | Lc -31.7 | Non-text elements, placeholder text |
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 600.
-
Step 50
50
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EAFA
oklch(93.5% 0.024 262.1)
-
Step 200
200
#C8DAF8
oklch(88.4% 0.046 260.7)
-
Step 300
300
#A3C2F7
oklch(81% 0.083 261)
-
Step 400
400
#71A0F3
oklch(70.8% 0.132 261.2)
-
Step 500
500
#4B85EE
oklch(63% 0.169 261.2)
-
Step 600
600 (this color)
#3674E5
oklch(58.1% 0.184 261.2)
-
Step 700
700
#225ABF
oklch(49.2% 0.169 261.1)
-
Step 800
800
#1D4A9B
oklch(42.7% 0.141 261)
-
Step 900
900
#1D3F7B
oklch(37.8% 0.11 260.8)
-
Step 950
950
#122548
oklch(27% 0.07 261.5)
#3674E5 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) | #2F81E9 | 0.033 |
| Deuteranopia (no green cones) | #0071E3 | 0.026 |
| Tritanopia (no blue cones) | #008FA2 | 0.142 |
| Achromatopsia (no color) | #787878 | 0.184 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3674E5
#3674E5
oklch(58.1% 0.184 261.2)
- #9E7200
#9E7200
oklch(58.1% 0.12 81.6)
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 #3674E5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.027
- Cerulean Blue #056EEE ΔE 0.032
- Clear Blue #247AFD ΔE 0.038
- Neon Blue #4361EE ΔE 0.048
- Bright Blue #0165FC ΔE 0.059
- Windows Blue #3778BF ΔE 0.061
- Azul #1D5DEC ΔE 0.063
- Cornflower #6A79F7 ΔE 0.065
Use #3674E5 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.