#3369D9
Closest named color: Royal Blue (#4169E1). oklch(54.8% 0.182 262.6), rgb(51, 105, 217).
Aa
White text reads best on this color (5.04:1).
About this color
#3369D9 is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.182 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.018 away. White text reads best on it, at 5.04:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.182) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.16:1 |
| White text | 5.04:1 |
Values
| HEX | #3369D9 |
| RGB | rgb(51, 105, 217) |
| HSL | hsl(220, 69%, 53%) |
| OKLCH | oklch(54.8% 0.182 262.6) |
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 #3369D9 | 5.04:1 | AA | Lc -79.8 | Fine for body text |
| Black text on #3369D9 | 4.16:1 | AA large text | Lc 29.7 | Dividers and decoration only |
| #3369D9 text on white | 5.04:1 | AA | Lc 74.4 | Content text, not long reading |
| #3369D9 text on black | 4.16:1 | AA large text | Lc -27.4 | 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAFA
oklch(93.6% 0.023 264.5)
-
Step 200
200
#C9DAF8
oklch(88.5% 0.045 261.9)
-
Step 300
300
#A5C1F6
oklch(80.9% 0.081 263)
-
Step 400
400
#749FF2
oklch(70.7% 0.131 262.7)
-
Step 500
500
#5085ED
oklch(63.2% 0.166 262.3)
-
Step 600
600 (this color)
#3369D9
oklch(54.8% 0.182 262.6)
-
Step 700
700
#2859BF
oklch(49.2% 0.169 262.6)
-
Step 800
800
#22499A
oklch(42.6% 0.14 262.7)
-
Step 900
900
#203E7B
oklch(37.7% 0.11 262.6)
-
Step 950
950
#132548
oklch(27% 0.069 262.3)
#3369D9 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) | #1C77DD | 0.035 |
| Deuteranopia (no green cones) | #0068D7 | 0.024 |
| Tritanopia (no blue cones) | #008497 | 0.142 |
| Achromatopsia (no color) | #6F6F6F | 0.182 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3369D9
#3369D9
oklch(54.8% 0.182 262.6)
- #916900
#916900
oklch(54.7% 0.113 82.2)
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 #3369D9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.018
- Cerulean Blue #056EEE ΔE 0.036
- Neon Blue #4361EE ΔE 0.040
- Warm Blue #4B57DB ΔE 0.045
- Azul #1D5DEC ΔE 0.046
- Bright Blue #0165FC ΔE 0.058
- Dark Periwinkle #665FD1 ΔE 0.060
- Mid Blue #276AB3 ΔE 0.061
Use #3369D9 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.