#3A6478
Closest named color: Slate (#516572). oklch(48.1% 0.057 230.1), rgb(58, 100, 120).
Aa
White text reads best on this color (6.41:1).
About this color
#3A6478 is a medium-dark, muted blue. In OKLCH its lightness is 48%, its chroma 0.057 and its hue 230°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.029 away. White text reads best on it, at 6.41:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | muted (0.057) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.27:1 |
| White text | 6.41:1 |
Values
| HEX | #3A6478 |
| RGB | rgb(58, 100, 120) |
| HSL | hsl(199, 35%, 35%) |
| OKLCH | oklch(48.1% 0.057 230.1) |
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 #3A6478 | 6.41:1 | AA | Lc -86.9 | Fine for body text |
| Black text on #3A6478 | 3.27:1 | AA large text | Lc 22.3 | Dividers and decoration only |
| #3A6478 text on white | 6.41:1 | AA | Lc 81.8 | Fine for body text |
| #3A6478 text on black | 3.27:1 | AA large text | Lc -20.1 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBEE
oklch(93.6% 0.008 228.9)
-
Step 200
200
#CFDBE1
oklch(88.4% 0.015 229)
-
Step 300
300
#AFC4CF
oklch(80.8% 0.028 230.4)
-
Step 400
400
#85A6B7
oklch(70.6% 0.044 230.5)
-
Step 500
500
#6690A5
oklch(63% 0.056 230.4)
-
Step 600
600
#4C7A91
oklch(55.6% 0.062 231.1)
-
Step 700
700 (this color)
#3A6478
oklch(48.1% 0.057 230.1)
-
Step 800
800
#335464
oklch(42.7% 0.047 230.3)
-
Step 900
900
#2D4551
oklch(37.6% 0.036 230.6)
-
Step 950
950
#1B2930
oklch(27.1% 0.023 230.3)
#3A6478 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) | #5A6379 | 0.041 |
| Deuteranopia (no green cones) | #515C78 | 0.035 |
| Tritanopia (no blue cones) | #196A6A | 0.043 |
| Achromatopsia (no color) | #5F5F5F | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A6478
#3A6478
oklch(48.1% 0.057 230.1)
- #785440
#785440
oklch(47.9% 0.057 50)
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 #3A6478, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.029
- YInMn Blue #415A77 ΔE 0.031
- Denim #3B638C ΔE 0.034
- Dark Aqua #05696B ΔE 0.045
- Dusty Grape #545775 ΔE 0.047
- Light Navy Blue #2E5A88 ΔE 0.048
- Petrol #005F6A ΔE 0.048
- Peacock Blue #016795 ΔE 0.052
Use #3A6478 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.