#3166C0
Closest named color: Mid Blue (#276AB3). oklch(52.3% 0.152 260.3), rgb(49, 102, 192).
Aa
White text reads best on this color (5.53:1).
About this color
#3166C0 is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.152 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.026 away. White text reads best on it, at 5.53:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.152) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.79:1 |
| White text | 5.53:1 |
Values
| HEX | #3166C0 |
| RGB | rgb(49, 102, 192) |
| HSL | hsl(218, 59%, 47%) |
| OKLCH | oklch(52.3% 0.152 260.3) |
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 #3166C0 | 5.53:1 | AA | Lc -82.6 | Fine for body text |
| Black text on #3166C0 | 3.79:1 | AA large text | Lc 26.8 | Dividers and decoration only |
| #3166C0 text on white | 5.53:1 | AA | Lc 77.3 | Fine for body text |
| #3166C0 text on black | 3.79:1 | AA large text | Lc -24.5 | 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 700.
-
Step 50
50
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CADAF5
oklch(88.5% 0.041 260.9)
-
Step 300
300
#A5C2F1
oklch(80.9% 0.074 260)
-
Step 400
400
#75A1EA
oklch(70.7% 0.118 260.2)
-
Step 500
500
#5187E3
oklch(63% 0.151 260.4)
-
Step 600
600
#356FD1
oklch(55.6% 0.163 260.2)
-
Step 700
700 (this color)
#3166C0
oklch(52.3% 0.152 260.3)
-
Step 800
800
#224C93
oklch(42.8% 0.126 260.2)
-
Step 900
900
#214075
oklch(37.7% 0.098 260.4)
-
Step 950
950
#142644
oklch(27% 0.061 260.1)
#3166C0 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) | #366FC3 | 0.026 |
| Deuteranopia (no green cones) | #1162BE | 0.024 |
| Tritanopia (no blue cones) | #007B8A | 0.118 |
| Achromatopsia (no color) | #686868 | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3166C0
#3166C0
oklch(52.3% 0.152 260.3)
- #8A6200
#8A6200
oklch(52.4% 0.108 80.6)
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 #3166C0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.026
- French Blue #436BAD ΔE 0.039
- Windows Blue #3778BF ΔE 0.051
- Royal Blue #4169E1 ΔE 0.054
- Flat Blue #3C73A8 ΔE 0.059
- Warm Blue #4B57DB ΔE 0.062
- Iris #6258C4 ΔE 0.064
- Nice Blue #107AB0 ΔE 0.066
Use #3166C0 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.