#3658A9
Closest named color: Denim Blue (#3B5B92). oklch(47.9% 0.136 264.7), rgb(54, 88, 169).
Aa
White text reads best on this color (6.71:1).
About this color
#3658A9 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.136 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.040 away. White text reads best on it, at 6.71:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.12:1 |
| White text | 6.71:1 |
Values
| HEX | #3658A9 |
| RGB | rgb(54, 88, 169) |
| HSL | hsl(222, 52%, 44%) |
| OKLCH | oklch(47.9% 0.136 264.7) |
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 #3658A9 | 6.71:1 | AA | Lc -87.9 | Fine for body text |
| Black text on #3658A9 | 3.12:1 | AA large text | Lc 21.2 | Dividers and decoration only |
| #3658A9 text on white | 6.71:1 | AA | Lc 82.8 | Fine for body text |
| #3658A9 text on black | 3.12:1 | AA large text | Lc -19.1 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CDD9F2
oklch(88.4% 0.037 265.1)
-
Step 300
300
#ACC1EC
oklch(81% 0.065 264.5)
-
Step 400
400
#809FE3
oklch(70.6% 0.106 265)
-
Step 500
500
#6086DA
oklch(63% 0.134 264.5)
-
Step 600
600
#486EC8
oklch(55.6% 0.146 264.8)
-
Step 700
700 (this color)
#3658A9
oklch(47.9% 0.136 264.7)
-
Step 800
800
#2F4B8C
oklch(42.6% 0.113 264.6)
-
Step 900
900
#2A3F70
oklch(37.6% 0.088 265)
-
Step 950
950
#192541
oklch(26.9% 0.055 265.3)
#3658A9 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) | #2E61AC | 0.024 |
| Deuteranopia (no green cones) | #1457A7 | 0.027 |
| Tritanopia (no blue cones) | #006B78 | 0.112 |
| Achromatopsia (no color) | #5C5C5C | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3658A9
#3658A9
oklch(47.9% 0.136 264.7)
- #775800
#775800
oklch(48% 0.098 84.7)
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 #3658A9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.040
- Dusky Blue #475F94 ΔE 0.047
- Mid Blue #276AB3 ΔE 0.049
- Dusk Blue #26538D ΔE 0.050
- Twilight #4E518B ΔE 0.055
- Light Navy Blue #2E5A88 ΔE 0.056
- French Blue #436BAD ΔE 0.057
- Denim #3B638C ΔE 0.062
Use #3658A9 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.