#374D73
Closest named color: Light Navy (#155084). oklch(42% 0.069 260.9), rgb(55, 77, 115).
Aa
White text reads best on this color (8.49:1).
About this color
#374D73 is a dark, muted blue. In OKLCH its lightness is 42%, its chroma 0.069 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.039 away. White text reads best on it, at 8.49:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.47:1 |
| White text | 8.49:1 |
Values
| HEX | #374D73 |
| RGB | rgb(55, 77, 115) |
| HSL | hsl(218, 35%, 33%) |
| OKLCH | oklch(42% 0.069 260.9) |
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 #374D73 | 8.49:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #374D73 | 2.47:1 | Fails | Lc 14.8 | Not readable |
| #374D73 text on white | 8.49:1 | AAA | Lc 89.2 | Fine for body text |
| #374D73 text on black | 2.47:1 | Fails | Lc -13.1 | 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
#F3F5F9
oklch(97% 0.006 264.5)
-
Step 100
100
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D1DAE8
oklch(88.6% 0.022 259.2)
-
Step 300
300
#B2C1DC
oklch(80.8% 0.042 262.3)
-
Step 400
400
#8AA2CA
oklch(70.8% 0.065 260.5)
-
Step 500
500
#6D8ABC
oklch(63.1% 0.083 261)
-
Step 600
600
#5573A8
oklch(55.5% 0.09 261.3)
-
Step 700
700
#456190
oklch(49.2% 0.083 260.4)
-
Step 800
800 (this color)
#374D73
oklch(42% 0.069 260.9)
-
Step 900
900
#31425E
oklch(37.7% 0.053 260.1)
-
Step 950
950
#1D2737
oklch(27.1% 0.033 259.6)
#374D73 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) | #3E5075 | 0.014 |
| Deuteranopia (no green cones) | #374A72 | 0.009 |
| Tritanopia (no blue cones) | #1C555B | 0.061 |
| Achromatopsia (no color) | #4D4D4D | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374D73
#374D73
oklch(42% 0.069 260.9)
- #60491B
#60491B
oklch(42% 0.07 82)
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 #374D73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.039
- YInMn Blue #415A77 ΔE 0.043
- Deep Sea Blue #015482 ΔE 0.043
- Dusk Blue #26538D ΔE 0.045
- Light Navy Blue #2E5A88 ΔE 0.046
- Dusk #4E5481 ΔE 0.046
- Dark Grey Blue #29465B ΔE 0.048
- Twilight #4E518B ΔE 0.054
Use #374D73 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.