#155673
Closest named color: Deep Sea Blue (#015482). oklch(42.8% 0.079 232.7), rgb(21, 86, 115).
Aa
White text reads best on this color (8.04:1).
About this color
#155673 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.079 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.028 away. White text reads best on it, at 8.04:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.61:1 |
| White text | 8.04:1 |
Values
| HEX | #155673 |
| RGB | rgb(21, 86, 115) |
| HSL | hsl(199, 69%, 27%) |
| OKLCH | oklch(42.8% 0.079 232.7) |
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 #155673 | 8.04:1 | AAA | Lc -92.2 | Preferred for body text |
| Black text on #155673 | 2.61:1 | Fails | Lc 16.5 | Dividers and decoration only |
| #155673 text on white | 8.04:1 | AAA | Lc 87.5 | Fine for body text |
| #155673 text on black | 2.61:1 | Fails | Lc -14.6 | 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
#E2ECF1
oklch(93.7% 0.013 228.9)
-
Step 200
200
#C9DCE7
oklch(88.4% 0.025 233)
-
Step 300
300
#A4C6DA
oklch(80.8% 0.046 233.9)
-
Step 400
400
#71A9C7
oklch(70.7% 0.073 232.6)
-
Step 500
500
#4793B9
oklch(63.1% 0.094 232.7)
-
Step 600
600
#237DA5
oklch(55.7% 0.102 232.6)
-
Step 700
700
#13698D
oklch(49.1% 0.095 232.5)
-
Step 800
800 (this color)
#155673
oklch(42.8% 0.079 232.7)
-
Step 900
900
#1A475D
oklch(37.7% 0.061 233)
-
Step 950
950
#112A36
oklch(27.1% 0.038 231.3)
#155673 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) | #485574 | 0.051 |
| Deuteranopia (no green cones) | #3B4C73 | 0.043 |
| Tritanopia (no blue cones) | #005E60 | 0.048 |
| Achromatopsia (no color) | #505050 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155673
#155673
oklch(42.8% 0.079 232.7)
- #714223
#714223
oklch(42.9% 0.079 52.5)
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 #155673, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.028
- Petrol #005F6A ΔE 0.037
- Light Navy #155084 ΔE 0.038
- Light Navy Blue #2E5A88 ΔE 0.043
- Deep Teal #00555A ΔE 0.045
- YInMn Blue #415A77 ΔE 0.045
- Dusk Blue #26538D ΔE 0.049
- Dark Grey Blue #29465B ΔE 0.056
Use #155673 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.