#175859
Closest named color: Deep Teal (#00555A). oklch(42.2% 0.063 196.5), rgb(23, 88, 89).
Aa
White text reads best on this color (8.15:1).
About this color
#175859 is a dark, muted teal or cyan. In OKLCH its lightness is 42%, its chroma 0.063 and its hue 197°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Teal (#00555A), ΔE 0.015 away. White text reads best on it, at 8.15:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Deep Teal (#00555A) |
| Black text | 2.57:1 |
| White text | 8.15:1 |
Values
| HEX | #175859 |
| RGB | rgb(23, 88, 89) |
| HSL | hsl(181, 59%, 22%) |
| OKLCH | oklch(42.2% 0.063 196.5) |
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 #175859 | 8.15:1 | AAA | Lc -92.6 | Preferred for body text |
| Black text on #175859 | 2.57:1 | Fails | Lc 16.1 | Dividers and decoration only |
| #175859 text on white | 8.15:1 | AAA | Lc 87.9 | Fine for body text |
| #175859 text on black | 2.57:1 | 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
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E2ECEC
oklch(93.6% 0.011 197)
-
Step 200
200
#CADEDE
oklch(88.6% 0.021 196.8)
-
Step 300
300
#A6C8C8
oklch(80.8% 0.036 196.5)
-
Step 400
400
#74ACAD
oklch(70.6% 0.059 197.3)
-
Step 500
500
#4C9899
oklch(63.2% 0.075 196.6)
-
Step 600
600
#298283
oklch(55.6% 0.082 196.1)
-
Step 700
700
#196E6F
oklch(49.1% 0.076 196.2)
-
Step 800
800 (this color)
#175859
oklch(42.2% 0.063 196.5)
-
Step 900
900
#1C4A4A
oklch(37.8% 0.05 195.3)
-
Step 950
950
#122B2B
oklch(26.9% 0.031 195.5)
#175859 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) | #525459 | 0.066 |
| Deuteranopia (no green cones) | #484C59 | 0.061 |
| Tritanopia (no blue cones) | #005B58 | 0.013 |
| Achromatopsia (no color) | #4F4F4F | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #175859
#175859
oklch(42.2% 0.063 196.5)
- #6C3F41
#6C3F41
oklch(42.2% 0.063 17.2)
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 #175859, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Teal #00555A ΔE 0.015
- Petrol #005F6A ΔE 0.030
- Dark Slate Gray #2F4F4F ΔE 0.031
- Dark Blue Green #005249 ΔE 0.033
- Dark Green Blue #1F6357 ΔE 0.039
- Dark Teal #014D4E ΔE 0.040
- Dark Aqua #05696B ΔE 0.054
- Charcoal #264653 ΔE 0.057
Use #175859 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.