#3166A5
Closest named color: Mid Blue (#276AB3). oklch(50.6% 0.116 254.3), rgb(49, 102, 165).
Aa
White text reads best on this color (5.87:1).
About this color
#3166A5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.116 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.023 away. White text reads best on it, at 5.87:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.57:1 |
| White text | 5.87:1 |
Values
| HEX | #3166A5 |
| RGB | rgb(49, 102, 165) |
| HSL | hsl(213, 54%, 42%) |
| OKLCH | oklch(50.6% 0.116 254.3) |
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 #3166A5 | 5.87:1 | AA | Lc -84.3 | Fine for body text |
| Black text on #3166A5 | 3.57:1 | AA large text | Lc 25.0 | Dividers and decoration only |
| #3166A5 text on white | 5.87:1 | AA | Lc 79.1 | Fine for body text |
| #3166A5 text on black | 3.57:1 | AA large text | Lc -22.7 | 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 700.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF5
oklch(93.7% 0.016 253.9)
-
Step 200
200
#CCDBEE
oklch(88.6% 0.031 254.3)
-
Step 300
300
#A8C3E5
oklch(80.9% 0.057 254.3)
-
Step 400
400
#7AA4D8
oklch(70.8% 0.089 254.2)
-
Step 500
500
#578CCD
oklch(63.1% 0.114 254.3)
-
Step 600
600
#3B75BA
oklch(55.7% 0.124 254.2)
-
Step 700
700 (this color)
#3166A5
oklch(50.6% 0.116 254.3)
-
Step 800
800
#265082
oklch(42.7% 0.096 254.3)
-
Step 900
900
#244368
oklch(37.8% 0.074 253.9)
-
Step 950
950
#16273D
oklch(27% 0.047 255.4)
#3166A5 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) | #496AA8 | 0.029 |
| Deuteranopia (no green cones) | #3860A4 | 0.017 |
| Tritanopia (no blue cones) | #00757D | 0.091 |
| Achromatopsia (no color) | #646464 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3166A5
#3166A5
oklch(50.6% 0.116 254.3)
- #885A00
#885A00
oklch(50.5% 0.107 74.6)
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 #3166A5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.023
- French Blue #436BAD ΔE 0.027
- Dusky Blue #475F94 ΔE 0.035
- Peacock Blue #016795 ΔE 0.037
- Muted Blue #3B719F ΔE 0.038
- Denim Blue #3B5B92 ΔE 0.039
- Denim #3B638C ΔE 0.040
- Flat Blue #3C73A8 ΔE 0.040
Use #3166A5 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.