#3669DF
Closest named color: Royal Blue (#4169E1). oklch(55.4% 0.189 263.7), rgb(54, 105, 223).
Aa
White text reads best on this color (4.94:1).
About this color
#3669DF is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.189 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.011 away. White text reads best on it, at 4.94:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.189) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.24:1 |
| White text | 4.94:1 |
Values
| HEX | #3669DF |
| RGB | rgb(54, 105, 223) |
| HSL | hsl(222, 73%, 54%) |
| OKLCH | oklch(55.4% 0.189 263.7) |
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 #3669DF | 4.94:1 | AA | Lc -79.2 | Fine for body text |
| Black text on #3669DF | 4.24:1 | AA large text | Lc 30.3 | Non-text elements, placeholder text |
| #3669DF text on white | 4.94:1 | AA | Lc 73.8 | Content text, not long reading |
| #3669DF text on black | 4.24:1 | AA large text | Lc -27.9 | 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 600.
-
Step 50
50
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C9DAF9
oklch(88.5% 0.047 262.5)
-
Step 300
300
#A5C1F8
oklch(81% 0.084 263.6)
-
Step 400
400
#749EF5
oklch(70.6% 0.136 263.7)
-
Step 500
500
#5183F1
oklch(63% 0.174 263.8)
-
Step 600
600 (this color)
#3669DF
oklch(55.4% 0.189 263.7)
-
Step 700
700
#2A57C2
oklch(49.1% 0.175 263.9)
-
Step 800
800
#23489D
oklch(42.7% 0.145 263.7)
-
Step 900
900
#213D7D
oklch(37.6% 0.114 264)
-
Step 950
950
#142449
oklch(26.9% 0.072 264.5)
#3669DF 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) | #0A78E3 | 0.039 |
| Deuteranopia (no green cones) | #0069DD | 0.025 |
| Tritanopia (no blue cones) | #00869A | 0.148 |
| Achromatopsia (no color) | #707070 | 0.189 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3669DF
#3669DF
oklch(55.4% 0.189 263.7)
- #926C00
#926C00
oklch(55.5% 0.114 84.1)
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 #3669DF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.011
- Cerulean Blue #056EEE ΔE 0.031
- Neon Blue #4361EE ΔE 0.032
- Azul #1D5DEC ΔE 0.041
- Warm Blue #4B57DB ΔE 0.044
- Bright Blue #0165FC ΔE 0.051
- Clear Blue #247AFD ΔE 0.058
- Dark Periwinkle #665FD1 ΔE 0.060
Use #3669DF 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.