#3668AD
Closest named color: Mid Blue (#276AB3). oklch(51.7% 0.122 257), rgb(54, 104, 173).
Aa
White text reads best on this color (5.61:1).
About this color
#3668AD is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.122 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.014 away. White text reads best on it, at 5.61:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.74:1 |
| White text | 5.61:1 |
Values
| HEX | #3668AD |
| RGB | rgb(54, 104, 173) |
| HSL | hsl(215, 52%, 45%) |
| OKLCH | oklch(51.7% 0.122 257) |
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 #3668AD | 5.61:1 | AA | Lc -83.1 | Fine for body text |
| Black text on #3668AD | 3.74:1 | AA large text | Lc 26.3 | Dividers and decoration only |
| #3668AD text on white | 5.61:1 | AA | Lc 77.8 | Fine for body text |
| #3668AD text on black | 3.74:1 | AA large text | Lc -24.0 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EBF6
oklch(93.7% 0.017 256.3)
-
Step 200
200
#CCDAEF
oklch(88.4% 0.033 258.4)
-
Step 300
300
#A9C3E7
oklch(81% 0.058 256.6)
-
Step 400
400
#7AA3DB
oklch(70.8% 0.094 256.4)
-
Step 500
500
#588BD2
oklch(63.2% 0.121 256.9)
-
Step 600
600
#3C73BF
oklch(55.6% 0.132 257)
-
Step 700
700 (this color)
#3668AD
oklch(51.7% 0.122 257)
-
Step 800
800
#274F85
oklch(42.7% 0.101 256.6)
-
Step 900
900
#25426B
oklch(37.8% 0.079 257.2)
-
Step 950
950
#16273F
oklch(27.1% 0.05 257.1)
#3668AD 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) | #496EB0 | 0.028 |
| Deuteranopia (no green cones) | #3662AC | 0.017 |
| Tritanopia (no blue cones) | #007882 | 0.098 |
| Achromatopsia (no color) | #676767 | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3668AD
#3668AD
oklch(51.7% 0.122 257)
- #8A5E00
#8A5E00
oklch(51.6% 0.108 77)
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 #3668AD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.014
- French Blue #436BAD ΔE 0.017
- Flat Blue #3C73A8 ΔE 0.036
- Muted Blue #3B719F ΔE 0.039
- Dusky Blue #475F94 ΔE 0.044
- Ocean Blue #03719C ΔE 0.048
- Windows Blue #3778BF ΔE 0.049
- Peacock Blue #016795 ΔE 0.050
Use #3668AD 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.