#155779
Closest named color: Deep Sea Blue (#015482). oklch(43.4% 0.084 236.6), rgb(21, 87, 121).
Aa
White text reads best on this color (7.86:1).
About this color
#155779 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.084 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.021 away. White text reads best on it, at 7.86:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.67:1 |
| White text | 7.86:1 |
Values
| HEX | #155779 |
| RGB | rgb(21, 87, 121) |
| HSL | hsl(200, 70%, 28%) |
| OKLCH | oklch(43.4% 0.084 236.6) |
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 #155779 | 7.86:1 | AAA | Lc -91.7 | Preferred for body text |
| Black text on #155779 | 2.67:1 | Fails | Lc 17.1 | Dividers and decoration only |
| #155779 text on white | 7.86:1 | AAA | Lc 86.9 | Fine for body text |
| #155779 text on black | 2.67:1 | Fails | Lc -15.2 | 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
#A3C6DD
oklch(80.9% 0.05 237)
-
Step 400
400
#6FA8CC
oklch(70.6% 0.08 237.2)
-
Step 500
500
#4592BF
oklch(63% 0.102 237.1)
-
Step 600
600
#1F7CAB
oklch(55.6% 0.11 236.5)
-
Step 700
700
#0E6893
oklch(49.1% 0.103 237)
-
Step 800
800 (this color)
#155779
oklch(43.4% 0.084 236.6)
-
Step 900
900
#194660
oklch(37.6% 0.066 237.6)
-
Step 950
950
#102938
oklch(26.9% 0.042 237.4)
#155779 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) | #47577B | 0.049 |
| Deuteranopia (no green cones) | #394E78 | 0.039 |
| Tritanopia (no blue cones) | #006063 | 0.054 |
| Achromatopsia (no color) | #525252 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #155779
#155779
oklch(43.4% 0.084 236.6)
- #73431D
#73431D
oklch(43.3% 0.084 56.2)
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 #155779, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.021
- Light Navy #155084 ΔE 0.031
- Light Navy Blue #2E5A88 ΔE 0.034
- Dusk Blue #26538D ΔE 0.040
- Petrol #005F6A ΔE 0.041
- YInMn Blue #415A77 ΔE 0.043
- Deep Teal #00555A ΔE 0.054
- Denim Blue #3B5B92 ΔE 0.056
Use #155779 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.