#336FC3
Closest named color: Windows Blue (#3778BF). oklch(54.6% 0.145 257.4), rgb(51, 111, 195).
Aa
White text reads best on this color (4.99:1).
About this color
#336FC3 is a medium-dark, vivid blue. In OKLCH its lightness is 55%, its chroma 0.145 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.028 away. White text reads best on it, at 4.99:1.
| Hue family | Blues |
| Lightness | medium-dark (55%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.20:1 |
| White text | 4.99:1 |
Values
| HEX | #336FC3 |
| RGB | rgb(51, 111, 195) |
| HSL | hsl(215, 59%, 48%) |
| OKLCH | oklch(54.6% 0.145 257.4) |
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 #336FC3 | 4.99:1 | AA | Lc -79.6 | Fine for body text |
| Black text on #336FC3 | 4.20:1 | AA large text | Lc 29.9 | Dividers and decoration only |
| #336FC3 text on white | 4.99:1 | AA | Lc 74.2 | Content text, not long reading |
| #336FC3 text on black | 4.20:1 | AA large text | Lc -27.5 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF7
oklch(93.7% 0.019 255.5)
-
Step 200
200
#CADAF2
oklch(88.4% 0.037 258.4)
-
Step 300
300
#A6C3EB
oklch(80.9% 0.065 256.5)
-
Step 400
400
#77A2E1
oklch(70.6% 0.104 257.8)
-
Step 500
500
#528AD9
oklch(63.1% 0.134 257.2)
-
Step 600
600 (this color)
#336FC3
oklch(54.6% 0.145 257.4)
-
Step 700
700
#285FAB
oklch(49% 0.135 257.3)
-
Step 800
800
#234E8B
oklch(42.7% 0.112 257.6)
-
Step 900
900
#21416F
oklch(37.6% 0.088 257.6)
-
Step 950
950
#142741
oklch(27.1% 0.055 256.6)
#336FC3 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) | #4677C6 | 0.030 |
| Deuteranopia (no green cones) | #2B69C1 | 0.019 |
| Tritanopia (no blue cones) | #00838F | 0.114 |
| Achromatopsia (no color) | #6F6F6F | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #336FC3
#336FC3
oklch(54.6% 0.145 257.4)
- #956600
#956600
oklch(54.6% 0.114 77.1)
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 #336FC3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.028
- Mid Blue #276AB3 ΔE 0.030
- French Blue #436BAD ΔE 0.036
- Flat Blue #3C73A8 ΔE 0.047
- Nice Blue #107AB0 ΔE 0.049
- Royal Blue #4169E1 ΔE 0.052
- Muted Blue #3B719F ΔE 0.059
- Water Blue #0E87CC ΔE 0.064
Use #336FC3 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.