#3668B2
Closest named color: Mid Blue (#276AB3). oklch(52% 0.129 258.2), rgb(54, 104, 178).
Aa
White text reads best on this color (5.55:1).
About this color
#3668B2 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 52%, its chroma 0.129 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.012 away. White text reads best on it, at 5.55:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.77:1 |
| White text | 5.55:1 |
Values
| HEX | #3668B2 |
| RGB | rgb(54, 104, 178) |
| HSL | hsl(216, 53%, 45%) |
| OKLCH | oklch(52% 0.129 258.2) |
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 #3668B2 | 5.55:1 | AA | Lc -82.8 | Fine for body text |
| Black text on #3668B2 | 3.77:1 | AA large text | Lc 26.6 | Dividers and decoration only |
| #3668B2 text on white | 5.55:1 | AA | Lc 77.5 | Fine for body text |
| #3668B2 text on black | 3.77:1 | AA large text | Lc -24.3 | 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
#E3EAF6
oklch(93.5% 0.018 261.3)
-
Step 200
200
#CBDAF1
oklch(88.4% 0.036 258.9)
-
Step 300
300
#A8C2E9
oklch(80.8% 0.062 258.4)
-
Step 400
400
#79A2DF
oklch(70.7% 0.101 258.1)
-
Step 500
500
#578AD6
oklch(63.2% 0.128 258.2)
-
Step 600
600
#3B72C3
oklch(55.5% 0.139 258.1)
-
Step 700
700 (this color)
#3668B2
oklch(52% 0.129 258.2)
-
Step 800
800
#274E88
oklch(42.7% 0.106 258.3)
-
Step 900
900
#24416D
oklch(37.6% 0.084 258.5)
-
Step 950
950
#162740
oklch(27.2% 0.052 257.9)
#3668B2 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) | #456EB5 | 0.024 |
| Deuteranopia (no green cones) | #3163B0 | 0.015 |
| Tritanopia (no blue cones) | #007984 | 0.103 |
| Achromatopsia (no color) | #686868 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3668B2
#3668B2
oklch(52% 0.129 258.2)
- #8B6000
#8B6000
oklch(52.1% 0.109 78.2)
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 #3668B2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.012
- French Blue #436BAD ΔE 0.019
- Flat Blue #3C73A8 ΔE 0.039
- Muted Blue #3B719F ΔE 0.044
- Windows Blue #3778BF ΔE 0.046
- Dusky Blue #475F94 ΔE 0.050
- Nice Blue #107AB0 ΔE 0.053
- Ocean Blue #03719C ΔE 0.054
Use #3668B2 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.