#175383
Closest named color: Deep Sea Blue (#015482). oklch(43% 0.099 247.4), rgb(23, 83, 131).
Aa
White text reads best on this color (8.07:1).
About this color
#175383 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.099 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.009 away. White text reads best on it, at 8.07:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.60:1 |
| White text | 8.07:1 |
Values
| HEX | #175383 |
| RGB | rgb(23, 83, 131) |
| HSL | hsl(207, 70%, 30%) |
| OKLCH | oklch(43% 0.099 247.4) |
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 #175383 | 8.07:1 | AAA | Lc -92.3 | Preferred for body text |
| Black text on #175383 | 2.60:1 | Fails | Lc 16.4 | Dividers and decoration only |
| #175383 text on white | 8.07:1 | AAA | Lc 87.6 | Fine for body text |
| #175383 text on black | 2.60:1 | Fails | Lc -14.5 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C9DCEE
oklch(88.6% 0.032 246.7)
-
Step 300
300
#A3C5E5
oklch(80.9% 0.058 247)
-
Step 400
400
#70A6D8
oklch(70.7% 0.093 247.4)
-
Step 500
500
#478FCD
oklch(63.1% 0.118 247)
-
Step 600
600
#2478BA
oklch(55.6% 0.129 247.1)
-
Step 700
700
#1564A1
oklch(49% 0.121 247.8)
-
Step 800
800 (this color)
#175383
oklch(43% 0.099 247.4)
-
Step 900
900
#1A4468
oklch(37.6% 0.077 247.6)
-
Step 950
950
#11283D
oklch(26.9% 0.049 248.1)
#175383 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) | #3C5585 | 0.036 |
| Deuteranopia (no green cones) | #2D4C82 | 0.025 |
| Tritanopia (no blue cones) | #005F65 | 0.072 |
| Achromatopsia (no color) | #505050 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #175383
#175383
oklch(43% 0.099 247.4)
- #714400
#714400
oklch(43% 0.094 67.9)
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 #175383, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.009
- Light Navy #155084 ΔE 0.010
- Dusk Blue #26538D ΔE 0.021
- Light Navy Blue #2E5A88 ΔE 0.031
- Cobalt #1E488F ΔE 0.040
- Denim Blue #3B5B92 ΔE 0.049
- Twilight Blue #0A437A ΔE 0.051
- YInMn Blue #415A77 ΔE 0.053
Use #175383 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.