#155778
Closest named color: Deep Sea Blue (#015482). oklch(43.3% 0.083 235.8), rgb(21, 87, 120).
Aa
White text reads best on this color (7.87:1).
About this color
#155778 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.083 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.022 away. White text reads best on it, at 7.87:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.66:1 |
| White text | 7.87:1 |
Values
| HEX | #155778 |
| RGB | rgb(21, 87, 120) |
| HSL | hsl(200, 70%, 28%) |
| OKLCH | oklch(43.3% 0.083 235.8) |
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 #155778 | 7.87:1 | AAA | Lc -91.7 | Preferred for body text |
| Black text on #155778 | 2.66:1 | Fails | Lc 17.0 | Dividers and decoration only |
| #155778 text on white | 7.87:1 | AAA | Lc 87.0 | Fine for body text |
| #155778 text on black | 2.66:1 | Fails | Lc -15.1 | 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
#70A9CB
oklch(70.8% 0.078 235.6)
-
Step 500
500
#4692BD
oklch(63% 0.099 236.1)
-
Step 600
600
#207CAA
oklch(55.6% 0.108 236.1)
-
Step 700
700
#0F6892
oklch(49% 0.101 236.4)
-
Step 800
800 (this color)
#155778
oklch(43.3% 0.083 235.8)
-
Step 900
900
#19475F
oklch(37.8% 0.064 235)
-
Step 950
950
#102938
oklch(26.9% 0.042 237.4)
#155778 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) | #47577A | 0.049 |
| Deuteranopia (no green cones) | #3A4D77 | 0.041 |
| Tritanopia (no blue cones) | #006062 | 0.054 |
| Achromatopsia (no color) | #515151 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155778
#155778
oklch(43.3% 0.083 235.8)
- #73431E
#73431E
oklch(43.3% 0.084 55.7)
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 #155778, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.022
- Light Navy #155084 ΔE 0.033
- Light Navy Blue #2E5A88 ΔE 0.035
- Petrol #005F6A ΔE 0.040
- Dusk Blue #26538D ΔE 0.042
- YInMn Blue #415A77 ΔE 0.043
- Deep Teal #00555A ΔE 0.053
- Denim Blue #3B5B92 ΔE 0.057
Use #155778 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.