#175A5D
Closest named color: Deep Teal (#00555A). oklch(42.9% 0.064 199.4), rgb(23, 90, 93).
Aa
White text reads best on this color (7.90:1).
About this color
#175A5D is a dark, muted teal or cyan. In OKLCH its lightness is 43%, its chroma 0.064 and its hue 199°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.020 away. White text reads best on it, at 7.90:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.65:1 |
| White text | 7.90:1 |
Values
| HEX | #175A5D |
| RGB | rgb(23, 90, 93) |
| HSL | hsl(183, 60%, 23%) |
| OKLCH | oklch(42.9% 0.064 199.4) |
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 #175A5D | 7.90:1 | AAA | Lc -91.9 | Preferred for body text |
| Black text on #175A5D | 2.65:1 | Fails | Lc 16.9 | Dividers and decoration only |
| #175A5D text on white | 7.90:1 | AAA | Lc 87.1 | Fine for body text |
| #175A5D text on black | 2.65:1 | Fails | Lc -15.0 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECED
oklch(93.6% 0.011 204.1)
-
Step 200
200
#CADEDE
oklch(88.6% 0.021 196.8)
-
Step 300
300
#A5C8CA
oklch(80.8% 0.037 200.7)
-
Step 400
400
#73ACAF
oklch(70.6% 0.06 200.1)
-
Step 500
500
#49989B
oklch(63.1% 0.077 198.7)
-
Step 600
600
#258286
oklch(55.6% 0.084 199.3)
-
Step 700
700
#156E72
oklch(49.2% 0.078 199.6)
-
Step 800
800 (this color)
#175A5D
oklch(42.9% 0.064 199.4)
-
Step 900
900
#1B4A4C
oklch(37.8% 0.051 199.1)
-
Step 950
950
#112B2C
oklch(26.9% 0.032 198.8)
#175A5D 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) | #53565D | 0.066 |
| Deuteranopia (no green cones) | #494E5D | 0.061 |
| Tritanopia (no blue cones) | #005D5B | 0.014 |
| Achromatopsia (no color) | #515151 | 0.065 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #175A5D
#175A5D
oklch(42.9% 0.064 199.4)
- #6F4141
#6F4141
oklch(43% 0.064 20)
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 #175A5D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.020
- Petrol #005F6A ΔE 0.023
- Dark Green Blue #1F6357 ΔE 0.035
- Dark Slate Gray #2F4F4F ΔE 0.037
- Dark Blue Green #005249 ΔE 0.041
- Dark Aqua #05696B ΔE 0.047
- Dark Teal #014D4E ΔE 0.048
- Charcoal #264653 ΔE 0.062
Use #175A5D 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.