#3671E9
Closest named color: Royal Blue (#4169E1). oklch(57.7% 0.192 262.4), rgb(54, 113, 233).
Aa
Black text reads best on this color (4.69:1).
About this color
#3671E9 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.192 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.022 away. Black text reads best on it, at 4.69:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.192) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.69:1 |
| White text | 4.47:1 |
Values
| HEX | #3671E9 |
| RGB | rgb(54, 113, 233) |
| HSL | hsl(220, 80%, 56%) |
| OKLCH | oklch(57.7% 0.192 262.4) |
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 #3671E9 | 4.47:1 | AA large text | Lc -76.0 | Fine for body text |
| Black text on #3671E9 | 4.69:1 | AA | Lc 33.6 | Non-text elements, placeholder text |
| #3671E9 text on white | 4.47:1 | AA large text | Lc 70.5 | Content text, not long reading |
| #3671E9 text on black | 4.69:1 | AA | Lc -31.1 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C8DAFA
oklch(88.5% 0.048 262)
-
Step 300
300
#A3C1F9
oklch(80.9% 0.086 262.7)
-
Step 400
400
#719FF6
oklch(70.7% 0.138 262.3)
-
Step 500
500
#4C84F3
oklch(63.2% 0.177 262.4)
-
Step 600
600 (this color)
#3671E9
oklch(57.7% 0.192 262.4)
-
Step 700
700
#2358C4
oklch(49.2% 0.178 262.3)
-
Step 800
800
#1E489E
oklch(42.6% 0.148 262.4)
-
Step 900
900
#1E3E7E
oklch(37.8% 0.115 262.3)
-
Step 950
950
#12254A
oklch(27.1% 0.073 262.2)
#3671E9 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) | #1D80ED | 0.037 |
| Deuteranopia (no green cones) | #006FE7 | 0.025 |
| Tritanopia (no blue cones) | #008EA2 | 0.150 |
| Achromatopsia (no color) | #777777 | 0.192 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3671E9
#3671E9
oklch(57.7% 0.192 262.4)
- #9C7100
#9C7100
oklch(57.7% 0.119 82)
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 #3671E9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.022
- Cerulean Blue #056EEE ΔE 0.026
- Clear Blue #247AFD ΔE 0.036
- Neon Blue #4361EE ΔE 0.039
- Bright Blue #0165FC ΔE 0.050
- Azul #1D5DEC ΔE 0.055
- Warm Blue #4B57DB ΔE 0.063
- Cornflower #6A79F7 ΔE 0.065
Use #3671E9 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.