#3A515D
Closest named color: Dark Slate Gray (#2F4F4F). oklch(42.1% 0.035 231.3), rgb(58, 81, 93).
Aa
White text reads best on this color (8.35:1).
About this color
#3A515D is a dark, muted blue. In OKLCH its lightness is 42%, its chroma 0.035 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.029 away. White text reads best on it, at 8.35:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | muted (0.035) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.51:1 |
| White text | 8.35:1 |
Values
| HEX | #3A515D |
| RGB | rgb(58, 81, 93) |
| HSL | hsl(201, 23%, 30%) |
| OKLCH | oklch(42.1% 0.035 231.3) |
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 #3A515D | 8.35:1 | AAA | Lc -93.4 | Preferred for body text |
| Black text on #3A515D | 2.51:1 | Fails | Lc 15.2 | Dividers and decoration only |
| #3A515D text on white | 8.35:1 | AAA | Lc 88.8 | Fine for body text |
| #3A515D text on black | 2.51:1 | Fails | Lc -13.4 | Not readable |
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 800.
-
Step 50
50
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E6EBED
oklch(93.7% 0.006 223.5)
-
Step 200
200
#D2DBDF
oklch(88.6% 0.011 226)
-
Step 300
300
#B4C3CB
oklch(80.8% 0.02 230.8)
-
Step 400
400
#8DA5B1
oklch(70.7% 0.032 229.4)
-
Step 500
500
#718E9E
oklch(63% 0.041 232.4)
-
Step 600
600
#587889
oklch(55.5% 0.045 231.8)
-
Step 700
700
#486574
oklch(49% 0.042 231.2)
-
Step 800
800 (this color)
#3A515D
oklch(42.1% 0.035 231.3)
-
Step 900
900
#33444D
oklch(37.6% 0.027 231.4)
-
Step 950
950
#1E282D
oklch(27% 0.017 229.8)
#3A515D 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) | #4B505E | 0.024 |
| Deuteranopia (no green cones) | #464C5D | 0.022 |
| Tritanopia (no blue cones) | #2E5455 | 0.024 |
| Achromatopsia (no color) | #4E4E4E | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A515D
#3A515D
oklch(42.1% 0.035 231.3)
- #5D483C
#5D483C
oklch(42% 0.035 51.2)
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 #3A515D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.029
- Dark Grey Blue #29465B ΔE 0.044
- Deep Teal #00555A ΔE 0.045
- Charcoal #264653 ΔE 0.047
- YInMn Blue #415A77 ΔE 0.048
- Petrol #005F6A ΔE 0.052
- Charcoal Grey #3C4142 ΔE 0.057
- Dark Teal #014D4E ΔE 0.057
Use #3A515D 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.