#3A5552
Closest named color: Dark Slate Gray (#2F4F4F). oklch(42.7% 0.033 187.4), rgb(58, 85, 82).
Aa
White text reads best on this color (8.07:1).
About this color
#3A5552 is a dark, muted teal or cyan. In OKLCH its lightness is 43%, its chroma 0.033 and its hue 187°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.025 away. White text reads best on it, at 8.07:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | muted (0.033) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.60:1 |
| White text | 8.07:1 |
Values
| HEX | #3A5552 |
| RGB | rgb(58, 85, 82) |
| HSL | hsl(173, 19%, 28%) |
| OKLCH | oklch(42.7% 0.033 187.4) |
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 #3A5552 | 8.07:1 | AAA | Lc -92.6 | Preferred for body text |
| Black text on #3A5552 | 2.60:1 | Fails | Lc 16.1 | Dividers and decoration only |
| #3A5552 text on white | 8.07:1 | AAA | Lc 87.9 | Fine for body text |
| #3A5552 text on black | 2.60:1 | Fails | Lc -14.2 | 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
#E6EBEA
oklch(93.6% 0.006 183)
-
Step 200
200
#D2DBDA
oklch(88.4% 0.01 189)
-
Step 300
300
#B3C5C3
oklch(80.9% 0.02 188.7)
-
Step 400
400
#8CA7A4
oklch(70.7% 0.03 188.3)
-
Step 500
500
#6F928D
oklch(63.2% 0.04 185.4)
-
Step 600
600
#567C78
oklch(55.7% 0.043 187.8)
-
Step 700
700
#466865
oklch(49% 0.04 189)
-
Step 800
800 (this color)
#3A5552
oklch(42.7% 0.033 187.4)
-
Step 900
900
#324644
oklch(37.7% 0.025 188.5)
-
Step 950
950
#1E2928
oklch(27% 0.015 189.4)
#3A5552 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) | #525252 | 0.035 |
| Deuteranopia (no green cones) | #4D4E52 | 0.033 |
| Tritanopia (no blue cones) | #315654 | 0.010 |
| Achromatopsia (no color) | #505050 | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A5552
#3A5552
oklch(42.7% 0.033 187.4)
- #5F484C
#5F484C
oklch(42.7% 0.032 6.9)
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 #3A5552, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.025
- Deep Teal #00555A ΔE 0.043
- Dark Green Blue #1F6357 ΔE 0.047
- Dark Blue Green #005249 ΔE 0.050
- Petrol #005F6A ΔE 0.050
- Dark Teal #014D4E ΔE 0.056
- Charcoal #264653 ΔE 0.059
- Dark Grey Blue #29465B ΔE 0.061
Use #3A5552 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.