#175478
Closest named color: Deep Sea Blue (#015482). oklch(42.6% 0.085 239.7), rgb(23, 84, 120).
Aa
White text reads best on this color (8.15:1).
About this color
#175478 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.085 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.018 away. White text reads best on it, at 8.15:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.57:1 |
| White text | 8.15:1 |
Values
| HEX | #175478 |
| RGB | rgb(23, 84, 120) |
| HSL | hsl(202, 68%, 28%) |
| OKLCH | oklch(42.6% 0.085 239.7) |
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 #175478 | 8.15:1 | AAA | Lc -92.5 | Preferred for body text |
| Black text on #175478 | 2.57:1 | Fails | Lc 16.1 | Dividers and decoration only |
| #175478 text on white | 8.15:1 | AAA | Lc 87.9 | Fine for body text |
| #175478 text on black | 2.57:1 | Fails | Lc -14.3 | 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
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#C9DCEA
oklch(88.5% 0.028 239.7)
-
Step 300
300
#A4C6DE
oklch(81% 0.05 239)
-
Step 400
400
#72A8CD
oklch(70.8% 0.079 239.3)
-
Step 500
500
#4991C0
oklch(63% 0.101 239.7)
-
Step 600
600
#267BAD
oklch(55.7% 0.11 239.6)
-
Step 700
700
#176794
oklch(49% 0.102 239.6)
-
Step 800
800 (this color)
#175478
oklch(42.6% 0.085 239.7)
-
Step 900
900
#1B4661
oklch(37.7% 0.066 239.5)
-
Step 950
950
#112939
oklch(27% 0.042 240.1)
#175478 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) | #43547A | 0.044 |
| Deuteranopia (no green cones) | #364B77 | 0.036 |
| Tritanopia (no blue cones) | #005D61 | 0.056 |
| Achromatopsia (no color) | #4F4F4F | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #175478
#175478
oklch(42.6% 0.085 239.7)
- #704217
#704217
oklch(42.6% 0.085 59.8)
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 #175478, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.018
- Light Navy #155084 ΔE 0.026
- Light Navy Blue #2E5A88 ΔE 0.037
- Dusk Blue #26538D ΔE 0.039
- YInMn Blue #415A77 ΔE 0.047
- Petrol #005F6A ΔE 0.048
- Deep Teal #00555A ΔE 0.055
- Twilight Blue #0A437A ΔE 0.055
Use #175478 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.