#356ACC
Closest named color: Royal Blue (#4169E1). oklch(54.2% 0.162 261.4), rgb(53, 106, 204).
Aa
White text reads best on this color (5.14:1).
About this color
#356ACC is a medium-dark, vivid blue. In OKLCH its lightness is 54%, its chroma 0.162 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.035 away. White text reads best on it, at 5.14:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | vivid (0.162) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 4.08:1 |
| White text | 5.14:1 |
Values
| HEX | #356ACC |
| RGB | rgb(53, 106, 204) |
| HSL | hsl(219, 60%, 50%) |
| OKLCH | oklch(54.2% 0.162 261.4) |
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 #356ACC | 5.14:1 | AA | Lc -80.4 | Fine for body text |
| Black text on #356ACC | 4.08:1 | AA large text | Lc 29.1 | Dividers and decoration only |
| #356ACC text on white | 5.14:1 | AA | Lc 75.0 | Fine for body text |
| #356ACC text on black | 4.08:1 | AA large text | Lc -26.7 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF8
oklch(93.5% 0.021 261.8)
-
Step 200
200
#CADAF5
oklch(88.5% 0.041 260.9)
-
Step 300
300
#A7C2F1
oklch(81% 0.073 261.4)
-
Step 400
400
#77A0E9
oklch(70.6% 0.117 261.4)
-
Step 500
500
#5487E3
oklch(63.1% 0.149 261.3)
-
Step 600
600 (this color)
#356ACC
oklch(54.2% 0.162 261.4)
-
Step 700
700
#2C5CB5
oklch(49.2% 0.151 261.4)
-
Step 800
800
#254B92
oklch(42.6% 0.125 261.5)
-
Step 900
900
#234075
oklch(37.8% 0.097 261.4)
-
Step 950
950
#152644
oklch(27.1% 0.061 261)
#356ACC 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) | #3375D0 | 0.029 |
| Deuteranopia (no green cones) | #0067CA | 0.028 |
| Tritanopia (no blue cones) | #008191 | 0.128 |
| Achromatopsia (no color) | #6D6D6D | 0.163 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #356ACC
#356ACC
oklch(54.2% 0.162 261.4)
- #906700
#906700
oklch(54.2% 0.112 81.1)
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 #356ACC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.035
- Mid Blue #276AB3 ΔE 0.042
- Windows Blue #3778BF ΔE 0.046
- French Blue #436BAD ΔE 0.050
- Cerulean Blue #056EEE ΔE 0.054
- Warm Blue #4B57DB ΔE 0.055
- Neon Blue #4361EE ΔE 0.059
- Dark Periwinkle #665FD1 ΔE 0.061
Use #356ACC 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.