#3559A8
Closest named color: Denim Blue (#3B5B92). oklch(48% 0.134 263.7), rgb(53, 89, 168).
Aa
White text reads best on this color (6.67:1).
About this color
#3559A8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.134 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.037 away. White text reads best on it, at 6.67:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.134) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.14:1 |
| White text | 6.67:1 |
Values
| HEX | #3559A8 |
| RGB | rgb(53, 89, 168) |
| HSL | hsl(221, 52%, 43%) |
| OKLCH | oklch(48% 0.134 263.7) |
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 #3559A8 | 6.67:1 | AA | Lc -87.7 | Fine for body text |
| Black text on #3559A8 | 3.14:1 | AA large text | Lc 21.4 | Dividers and decoration only |
| #3559A8 text on white | 6.67:1 | AA | Lc 82.7 | Fine for body text |
| #3559A8 text on black | 3.14:1 | AA large text | Lc -19.3 | 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
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CDDAF2
oklch(88.6% 0.036 262.8)
-
Step 300
300
#ABC1EB
oklch(80.9% 0.064 263.3)
-
Step 400
400
#7FA0E1
oklch(70.7% 0.103 263.3)
-
Step 500
500
#5F87D9
oklch(63.1% 0.132 263.4)
-
Step 600
600
#466FC7
oklch(55.6% 0.144 263.6)
-
Step 700
700 (this color)
#3559A8
oklch(48% 0.134 263.7)
-
Step 800
800
#2F4C8B
oklch(42.8% 0.11 263.8)
-
Step 900
900
#29406F
oklch(37.8% 0.086 263.2)
-
Step 950
950
#182641
oklch(27.1% 0.054 262.5)
#3559A8 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) | #3162AB | 0.024 |
| Deuteranopia (no green cones) | #1957A6 | 0.025 |
| Tritanopia (no blue cones) | #006B78 | 0.109 |
| Achromatopsia (no color) | #5C5C5C | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3559A8
#3559A8
oklch(48% 0.134 263.7)
- #785800
#785800
oklch(48.1% 0.099 84)
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 #3559A8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.037
- Dusky Blue #475F94 ΔE 0.045
- Mid Blue #276AB3 ΔE 0.047
- Dusk Blue #26538D ΔE 0.049
- Light Navy Blue #2E5A88 ΔE 0.054
- French Blue #436BAD ΔE 0.054
- Twilight #4E518B ΔE 0.055
- Denim #3B638C ΔE 0.059
Use #3559A8 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.