#3A515B
Closest named color: Dark Slate Gray (#2F4F4F). oklch(42% 0.033 226.6), rgb(58, 81, 91).
Aa
White text reads best on this color (8.37:1).
About this color
#3A515B is a dark, muted teal or cyan. In OKLCH its lightness is 42%, its chroma 0.033 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.026 away. White text reads best on it, at 8.37:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | muted (0.033) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.50:1 |
| White text | 8.37:1 |
Values
| HEX | #3A515B |
| RGB | rgb(58, 81, 91) |
| HSL | hsl(198, 22%, 29%) |
| OKLCH | oklch(42% 0.033 226.6) |
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 #3A515B | 8.37:1 | AAA | Lc -93.4 | Preferred for body text |
| Black text on #3A515B | 2.50:1 | Fails | Lc 15.1 | Dividers and decoration only |
| #3A515B text on white | 8.37:1 | AAA | Lc 88.9 | Fine for body text |
| #3A515B text on black | 2.50:1 | Fails | Lc -13.3 | 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
#B4C3CA
oklch(80.8% 0.019 227.3)
-
Step 400
400
#8DA5AF
oklch(70.7% 0.031 224.9)
-
Step 500
500
#718F9C
oklch(63.2% 0.039 226.2)
-
Step 600
600
#597987
oklch(55.7% 0.043 226.7)
-
Step 700
700
#496672
oklch(49.2% 0.039 225.5)
-
Step 800
800 (this color)
#3A515B
oklch(42% 0.033 226.6)
-
Step 900
900
#33454C
oklch(37.8% 0.026 223.7)
-
Step 950
950
#1E282D
oklch(27% 0.017 229.8)
#3A515B 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) | #4C505C | 0.026 |
| Deuteranopia (no green cones) | #474C5B | 0.023 |
| Tritanopia (no blue cones) | #2F5454 | 0.022 |
| Achromatopsia (no color) | #4E4E4E | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A515B
#3A515B
oklch(42% 0.033 226.6)
- #5D483E
#5D483E
oklch(42.1% 0.033 46.8)
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 #3A515B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.026
- Deep Teal #00555A ΔE 0.044
- Dark Grey Blue #29465B ΔE 0.044
- Charcoal #264653 ΔE 0.046
- YInMn Blue #415A77 ΔE 0.050
- Petrol #005F6A ΔE 0.052
- Charcoal Grey #3C4142 ΔE 0.056
- Dark Teal #014D4E ΔE 0.056
Use #3A515B 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.