#3A5456
Closest named color: Dark Slate Gray (#2F4F4F). oklch(42.6% 0.031 202), rgb(58, 84, 86).
Aa
White text reads best on this color (8.13:1).
About this color
#3A5456 is a dark, muted teal or cyan. In OKLCH its lightness is 43%, its chroma 0.031 and its hue 202°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.024 away. White text reads best on it, at 8.13:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | muted (0.031) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.58:1 |
| White text | 8.13:1 |
Values
| HEX | #3A5456 |
| RGB | rgb(58, 84, 86) |
| HSL | hsl(184, 19%, 28%) |
| OKLCH | oklch(42.6% 0.031 202) |
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 #3A5456 | 8.13:1 | AAA | Lc -92.8 | Preferred for body text |
| Black text on #3A5456 | 2.58:1 | Fails | Lc 15.9 | Dividers and decoration only |
| #3A5456 text on white | 8.13:1 | AAA | Lc 88.1 | Fine for body text |
| #3A5456 text on black | 2.58:1 | Fails | Lc -14.0 | 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
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E6EBEB
oklch(93.6% 0.005 197.1)
-
Step 200
200
#D2DBDC
oklch(88.5% 0.01 204.9)
-
Step 300
300
#B4C4C6
oklch(80.9% 0.018 205.8)
-
Step 400
400
#8CA6A8
oklch(70.6% 0.029 202.2)
-
Step 500
500
#6F9193
oklch(63.2% 0.038 200.7)
-
Step 600
600
#577B7E
oklch(55.7% 0.041 202.5)
-
Step 700
700
#47676A
oklch(49% 0.037 203.3)
-
Step 800
800 (this color)
#3A5456
oklch(42.6% 0.031 202)
-
Step 900
900
#324647
oklch(37.8% 0.025 200)
-
Step 950
950
#1E292A
oklch(27.1% 0.015 203.2)
#3A5456 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) | #505256 | 0.031 |
| Deuteranopia (no green cones) | #4B4E56 | 0.029 |
| Tritanopia (no blue cones) | #305655 | 0.013 |
| Achromatopsia (no color) | #4F4F4F | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A5456
#3A5456
oklch(42.6% 0.031 202)
- #5F4847
#5F4847
oklch(42.6% 0.032 21.4)
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 #3A5456, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.024
- Deep Teal #00555A ΔE 0.042
- Petrol #005F6A ΔE 0.049
- Dark Green Blue #1F6357 ΔE 0.051
- Dark Blue Green #005249 ΔE 0.053
- Charcoal #264653 ΔE 0.054
- Dark Grey Blue #29465B ΔE 0.055
- YInMn Blue #415A77 ΔE 0.056
Use #3A5456 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.