#3A669C
Closest named color: Dusky Blue (#475F94). oklch(50.4% 0.1 254.5), rgb(58, 102, 156).
Aa
White text reads best on this color (5.89:1).
About this color
#3A669C is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.100 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Dusky Blue (#475F94), ΔE 0.024 away. White text reads best on it, at 5.89:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Dusky Blue (#475F94) |
| Black text | 3.56:1 |
| White text | 5.89:1 |
Values
| HEX | #3A669C |
| RGB | rgb(58, 102, 156) |
| HSL | hsl(213, 46%, 42%) |
| OKLCH | oklch(50.4% 0.1 254.5) |
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 #3A669C | 5.89:1 | AA | Lc -84.5 | Fine for body text |
| Black text on #3A669C | 3.56:1 | AA large text | Lc 24.8 | Dividers and decoration only |
| #3A669C text on white | 5.89:1 | AA | Lc 79.3 | Fine for body text |
| #3A669C text on black | 3.56:1 | AA large text | Lc -22.5 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EBF3
oklch(93.7% 0.013 251.6)
-
Step 200
200
#CEDAEB
oklch(88.4% 0.027 257)
-
Step 300
300
#ACC3E0
oklch(80.9% 0.048 254.3)
-
Step 400
400
#80A3D0
oklch(70.6% 0.077 255)
-
Step 500
500
#5F8CC4
oklch(63.1% 0.098 254.5)
-
Step 600
600
#4575B1
oklch(55.6% 0.108 254.8)
-
Step 700
700 (this color)
#3A669C
oklch(50.4% 0.1 254.5)
-
Step 800
800
#2D507B
oklch(42.6% 0.083 254.5)
-
Step 900
900
#294363
oklch(37.8% 0.064 254.3)
-
Step 950
950
#18273A
oklch(26.9% 0.041 254.8)
#3A669C 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) | #4F699E | 0.027 |
| Deuteranopia (no green cones) | #42609B | 0.018 |
| Tritanopia (no blue cones) | #00727A | 0.081 |
| Achromatopsia (no color) | #646464 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A669C
#3A669C
oklch(50.4% 0.1 254.5)
- #855B12
#855B12
oklch(50.4% 0.099 75.2)
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 #3A669C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusky Blue #475F94 ΔE 0.024
- Denim #3B638C ΔE 0.025
- French Blue #436BAD ΔE 0.031
- Muted Blue #3B719F ΔE 0.032
- Denim Blue #3B5B92 ΔE 0.033
- Peacock Blue #016795 ΔE 0.035
- Mid Blue #276AB3 ΔE 0.037
- Flat Blue #3C73A8 ΔE 0.039
Use #3A669C 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.