#175979
Closest named color: Deep Sea Blue (#015482). oklch(43.9% 0.082 234.8), rgb(23, 89, 121).
Aa
White text reads best on this color (7.66:1).
About this color
#175979 is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.082 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.026 away. White text reads best on it, at 7.66:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.74:1 |
| White text | 7.66:1 |
Values
| HEX | #175979 |
| RGB | rgb(23, 89, 121) |
| HSL | hsl(200, 68%, 28%) |
| OKLCH | oklch(43.9% 0.082 234.8) |
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 #175979 | 7.66:1 | AAA | Lc -91.1 | Preferred for body text |
| Black text on #175979 | 2.74:1 | Fails | Lc 17.7 | Dividers and decoration only |
| #175979 text on white | 7.66:1 | AAA | Lc 86.3 | Fine for body text |
| #175979 text on black | 2.74:1 | Fails | Lc -15.8 | Dividers and decoration only |
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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C9DCE9
oklch(88.4% 0.027 237.6)
-
Step 300
300
#A3C6DC
oklch(80.8% 0.049 235.8)
-
Step 400
400
#6FA9CA
oklch(70.7% 0.077 234.4)
-
Step 500
500
#4593BC
oklch(63.1% 0.098 234.3)
-
Step 600
600
#1F7CA9
oklch(55.5% 0.108 235.4)
-
Step 700
700
#0E6991
oklch(49.2% 0.1 234.8)
-
Step 800
800 (this color)
#175979
oklch(43.9% 0.082 234.8)
-
Step 900
900
#18475F
oklch(37.8% 0.065 234.6)
-
Step 950
950
#102A37
oklch(27.1% 0.04 232.6)
#175979 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) | #49587A | 0.050 |
| Deuteranopia (no green cones) | #3C4F78 | 0.042 |
| Tritanopia (no blue cones) | #006164 | 0.050 |
| Achromatopsia (no color) | #535353 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #175979
#175979
oklch(43.9% 0.082 234.8)
- #754522
#754522
oklch(44% 0.082 54.7)
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 #175979, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.026
- Light Navy Blue #2E5A88 ΔE 0.032
- Petrol #005F6A ΔE 0.037
- Light Navy #155084 ΔE 0.037
- YInMn Blue #415A77 ΔE 0.039
- Dusk Blue #26538D ΔE 0.043
- Denim #3B638C ΔE 0.054
- Deep Teal #00555A ΔE 0.054
Use #175979 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.