#345F55
Closest named color: Dark Green Blue (#1F6357). oklch(45.1% 0.051 177.2), rgb(52, 95, 85).
Aa
White text reads best on this color (7.20:1).
About this color
#345F55 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 45%, its chroma 0.051 and its hue 177°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.019 away. White text reads best on it, at 7.20:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (45%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.91:1 |
| White text | 7.20:1 |
Values
| HEX | #345F55 |
| RGB | rgb(52, 95, 85) |
| HSL | hsl(166, 29%, 29%) |
| OKLCH | oklch(45.1% 0.051 177.2) |
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 #345F55 | 7.20:1 | AAA | Lc -89.8 | Fine for body text |
| Black text on #345F55 | 2.91:1 | Fails | Lc 19.1 | Dividers and decoration only |
| #345F55 text on white | 7.20:1 | AAA | Lc 84.9 | Fine for body text |
| #345F55 text on black | 2.91:1 | Fails | Lc -17.1 | 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 800.
-
Step 50
50
#F3F6F5
oklch(97.1% 0.003 174.5)
-
Step 100
100
#E4ECEA
oklch(93.6% 0.009 179.6)
-
Step 200
200
#CEDDD9
oklch(88.5% 0.017 178.2)
-
Step 300
300
#ADC7C0
oklch(80.8% 0.03 177.5)
-
Step 400
400
#81ABA0
oklch(70.7% 0.048 177)
-
Step 500
500
#609689
oklch(63.1% 0.061 177.3)
-
Step 600
600
#458073
oklch(55.6% 0.066 177.8)
-
Step 700
700
#366C60
oklch(49% 0.061 177.4)
-
Step 800
800 (this color)
#345F55
oklch(45.1% 0.051 177.2)
-
Step 900
900
#294941
oklch(37.8% 0.041 176.2)
-
Step 950
950
#192B26
oklch(27.2% 0.026 174.9)
#345F55 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) | #5C5A55 | 0.054 |
| Deuteranopia (no green cones) | #555556 | 0.052 |
| Tritanopia (no blue cones) | #25605C | 0.015 |
| Achromatopsia (no color) | #575757 | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #345F55
#345F55
oklch(45.1% 0.051 177.2)
- #6D4A56
#6D4A56
oklch(45.2% 0.051 357.1)
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 #345F55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.019
- Dark Aqua #05696B ΔE 0.042
- Petrol #005F6A ΔE 0.043
- Dark Slate Gray #2F4F4F ΔE 0.052
- Pine #2B5D34 ΔE 0.052
- Deep Teal #00555A ΔE 0.052
- Spruce #0A5F38 ΔE 0.059
- Dark Blue Green #005249 ΔE 0.061
Use #345F55 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.