#3657A5
Closest named color: Denim Blue (#3B5B92). oklch(47.4% 0.131 264.6), rgb(54, 87, 165).
Aa
White text reads best on this color (6.85:1).
About this color
#3657A5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.131 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.035 away. White text reads best on it, at 6.85:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.06:1 |
| White text | 6.85:1 |
Values
| HEX | #3657A5 |
| RGB | rgb(54, 87, 165) |
| HSL | hsl(222, 51%, 43%) |
| OKLCH | oklch(47.4% 0.131 264.6) |
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 #3657A5 | 6.85:1 | AA | Lc -88.4 | Fine for body text |
| Black text on #3657A5 | 3.06:1 | AA large text | Lc 20.6 | Dividers and decoration only |
| #3657A5 text on white | 6.85:1 | AA | Lc 83.4 | Fine for body text |
| #3657A5 text on black | 3.06:1 | AA large text | Lc -18.5 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CED9F1
oklch(88.4% 0.035 266)
-
Step 300
300
#ACC1EB
oklch(80.9% 0.064 264.1)
-
Step 400
400
#81A0E1
oklch(70.8% 0.102 264.4)
-
Step 500
500
#6286D8
oklch(63% 0.131 265)
-
Step 600
600
#496FC5
oklch(55.7% 0.14 264.4)
-
Step 700
700 (this color)
#3657A5
oklch(47.4% 0.131 264.6)
-
Step 800
800
#314C8A
oklch(42.8% 0.108 264.6)
-
Step 900
900
#2B3F6E
oklch(37.6% 0.085 265.2)
-
Step 950
950
#192541
oklch(26.9% 0.055 265.3)
#3657A5 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) | #2F60A8 | 0.024 |
| Deuteranopia (no green cones) | #1956A3 | 0.025 |
| Tritanopia (no blue cones) | #006976 | 0.108 |
| Achromatopsia (no color) | #5A5A5A | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3657A5
#3657A5
oklch(47.4% 0.131 264.6)
- #755600
#755600
oklch(47.3% 0.097 84.3)
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 #3657A5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.035
- Dusk Blue #26538D ΔE 0.044
- Dusky Blue #475F94 ΔE 0.044
- Twilight #4E518B ΔE 0.050
- Light Navy Blue #2E5A88 ΔE 0.051
- Mid Blue #276AB3 ΔE 0.053
- Denim #3B638C ΔE 0.059
- French Blue #436BAD ΔE 0.060
Use #3657A5 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.