#175170
Closest named color: Deep Sea Blue (#015482). oklch(41.3% 0.078 236.8), rgb(23, 81, 112).
Aa
White text reads best on this color (8.58:1).
About this color
#175170 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.078 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.030 away. White text reads best on it, at 8.58:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.44:1 |
| White text | 8.58:1 |
Values
| HEX | #175170 |
| RGB | rgb(23, 81, 112) |
| HSL | hsl(201, 66%, 26%) |
| OKLCH | oklch(41.3% 0.078 236.8) |
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 #175170 | 8.58:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #175170 | 2.44:1 | Fails | Lc 14.8 | Not readable |
| #175170 text on white | 8.58:1 | AAA | Lc 89.2 | Fine for body text |
| #175170 text on black | 2.44:1 | Fails | Lc -13.0 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF2
oklch(93.5% 0.014 241)
-
Step 200
200
#CADCE8
oklch(88.5% 0.025 236.9)
-
Step 300
300
#A6C6DB
oklch(81% 0.045 236.9)
-
Step 400
400
#74A8C8
oklch(70.7% 0.072 236.2)
-
Step 500
500
#4D92BB
oklch(63.2% 0.093 236.9)
-
Step 600
600
#2C7BA7
oklch(55.5% 0.102 237.3)
-
Step 700
700
#1E688F
oklch(49.2% 0.094 236.7)
-
Step 800
800 (this color)
#175170
oklch(41.3% 0.078 236.8)
-
Step 900
900
#1E465E
oklch(37.7% 0.061 237.7)
-
Step 950
950
#122937
oklch(26.9% 0.039 237.4)
#175170 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) | #425171 | 0.045 |
| Deuteranopia (no green cones) | #36486F | 0.037 |
| Tritanopia (no blue cones) | #00595C | 0.050 |
| Achromatopsia (no color) | #4C4C4C | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #175170
#175170
oklch(41.3% 0.078 236.8)
- #6B3F1C
#6B3F1C
oklch(41.3% 0.078 56.6)
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 #175170, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.030
- Light Navy #155084 ΔE 0.035
- Dark Grey Blue #29465B ΔE 0.043
- Deep Teal #00555A ΔE 0.045
- Petrol #005F6A ΔE 0.049
- Dusk Blue #26538D ΔE 0.051
- Light Navy Blue #2E5A88 ΔE 0.051
- Twilight Blue #0A437A ΔE 0.052
Use #175170 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.