#3365D2
Closest named color: Royal Blue (#4169E1). oklch(53.5% 0.177 263.2), rgb(51, 101, 210).
Aa
White text reads best on this color (5.33:1).
About this color
#3365D2 is a medium-dark, vivid blue. In OKLCH its lightness is 53%, its chroma 0.177 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.029 away. White text reads best on it, at 5.33:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.177) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 3.93:1 |
| White text | 5.33:1 |
Values
| HEX | #3365D2 |
| RGB | rgb(51, 101, 210) |
| HSL | hsl(221, 64%, 51%) |
| OKLCH | oklch(53.5% 0.177 263.2) |
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 #3365D2 | 5.33:1 | AA | Lc -81.5 | Fine for body text |
| Black text on #3365D2 | 3.93:1 | AA large text | Lc 28.0 | Dividers and decoration only |
| #3365D2 text on white | 5.33:1 | AA | Lc 76.1 | Fine for body text |
| #3365D2 text on black | 3.93:1 | AA large text | Lc -25.6 | 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 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
#CADAF7
oklch(88.5% 0.044 262.4)
-
Step 300
300
#A6C1F5
oklch(80.9% 0.08 263.3)
-
Step 400
400
#769FF0
oklch(70.7% 0.128 263.1)
-
Step 500
500
#5385EB
oklch(63.2% 0.163 262.9)
-
Step 600
600 (this color)
#3365D2
oklch(53.5% 0.177 263.2)
-
Step 700
700
#2C59BC
oklch(49.1% 0.164 263.3)
-
Step 800
800
#254998
oklch(42.6% 0.136 263.3)
-
Step 900
900
#223E79
oklch(37.6% 0.106 263.2)
-
Step 950
950
#142547
oklch(27% 0.067 262.7)
#3365D2 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) | #1973D6 | 0.036 |
| Deuteranopia (no green cones) | #0064D0 | 0.025 |
| Tritanopia (no blue cones) | #007F92 | 0.138 |
| Achromatopsia (no color) | #6B6B6B | 0.177 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3365D2
#3365D2
oklch(53.5% 0.177 263.2)
- #8C6600
#8C6600
oklch(53.5% 0.11 82.9)
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 #3365D2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.029
- Warm Blue #4B57DB ΔE 0.041
- Neon Blue #4361EE ΔE 0.047
- Azul #1D5DEC ΔE 0.048
- Cerulean Blue #056EEE ΔE 0.048
- Mid Blue #276AB3 ΔE 0.053
- Dark Periwinkle #665FD1 ΔE 0.060
- Iris #6258C4 ΔE 0.062
Use #3365D2 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.