#3A5C99
Closest named color: Denim Blue (#3B5B92). oklch(47.9% 0.107 261.3), rgb(58, 92, 153).
Aa
White text reads best on this color (6.62:1).
About this color
#3A5C99 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.107 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.011 away. White text reads best on it, at 6.62:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.17:1 |
| White text | 6.62:1 |
Values
| HEX | #3A5C99 |
| RGB | rgb(58, 92, 153) |
| HSL | hsl(219, 45%, 41%) |
| OKLCH | oklch(47.9% 0.107 261.3) |
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 #3A5C99 | 6.62:1 | AA | Lc -87.6 | Fine for body text |
| Black text on #3A5C99 | 3.17:1 | AA large text | Lc 21.5 | Dividers and decoration only |
| #3A5C99 text on white | 6.62:1 | AA | Lc 82.6 | Fine for body text |
| #3A5C99 text on black | 3.17:1 | AA large text | Lc -19.4 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CFDAED
oklch(88.6% 0.029 261.5)
-
Step 300
300
#AEC2E3
oklch(81% 0.052 260.4)
-
Step 400
400
#84A1D5
oklch(70.7% 0.083 261.8)
-
Step 500
500
#6589C9
oklch(63% 0.105 261.4)
-
Step 600
600
#4C72B6
oklch(55.6% 0.115 261.3)
-
Step 700
700 (this color)
#3A5C99
oklch(47.9% 0.107 261.3)
-
Step 800
800
#334E7F
oklch(42.7% 0.088 261.5)
-
Step 900
900
#2C4166
oklch(37.6% 0.069 261.2)
-
Step 950
950
#1A263C
oklch(26.9% 0.045 261.9)
#3A5C99 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) | #42619B | 0.018 |
| Deuteranopia (no green cones) | #355998 | 0.011 |
| Tritanopia (no blue cones) | #006A73 | 0.091 |
| Achromatopsia (no color) | #5D5D5D | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A5C99
#3A5C99
oklch(47.9% 0.107 261.3)
- #795600
#795600
oklch(47.8% 0.099 81.2)
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 #3A5C99, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.011
- Dusky Blue #475F94 ΔE 0.021
- Light Navy Blue #2E5A88 ΔE 0.032
- Denim #3B638C ΔE 0.033
- Dusk Blue #26538D ΔE 0.039
- Twilight #4E518B ΔE 0.040
- Peacock Blue #016795 ΔE 0.044
- Dusk #4E5481 ΔE 0.045
Use #3A5C99 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.