#374C69
Closest named color: Dark Grey Blue (#29465B). oklch(41.2% 0.056 256.6), rgb(55, 76, 105).
Aa
White text reads best on this color (8.74:1).
About this color
#374C69 is a dark, muted blue. In OKLCH its lightness is 41%, its chroma 0.056 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.035 away. White text reads best on it, at 8.74:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.40:1 |
| White text | 8.74:1 |
Values
| HEX | #374C69 |
| RGB | rgb(55, 76, 105) |
| HSL | hsl(215, 31%, 31%) |
| OKLCH | oklch(41.2% 0.056 256.6) |
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 #374C69 | 8.74:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #374C69 | 2.40:1 | Fails | Lc 14.1 | Not readable |
| #374C69 text on white | 8.74:1 | AAA | Lc 89.9 | Fine for body text |
| #374C69 text on black | 2.40:1 | Fails | Lc -12.4 | 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
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAF0
oklch(93.6% 0.009 258.3)
-
Step 200
200
#D2DAE5
oklch(88.6% 0.017 256.3)
-
Step 300
300
#B3C2D6
oklch(80.9% 0.033 255.6)
-
Step 400
400
#8CA2C1
oklch(70.6% 0.052 257)
-
Step 500
500
#6F8BB2
oklch(63% 0.067 256.7)
-
Step 600
600
#58759D
oklch(55.6% 0.071 256.6)
-
Step 700
700
#486287
oklch(49.1% 0.067 257.2)
-
Step 800
800 (this color)
#374C69
oklch(41.2% 0.056 256.6)
-
Step 900
900
#334359
oklch(37.9% 0.043 256.5)
-
Step 950
950
#1E2734
oklch(27% 0.028 257.5)
#374C69 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) | #414E6A | 0.016 |
| Deuteranopia (no green cones) | #3B4968 | 0.010 |
| Tritanopia (no blue cones) | #235256 | 0.049 |
| Achromatopsia (no color) | #4B4B4B | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374C69
#374C69
oklch(41.2% 0.056 256.6)
- #5C4727
#5C4727
oklch(41.2% 0.055 76.8)
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 #374C69, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.035
- Charcoal #264653 ΔE 0.047
- YInMn Blue #415A77 ΔE 0.048
- Dark Slate Gray #2F4F4F ΔE 0.051
- Light Navy #155084 ΔE 0.051
- Deep Sea Blue #015482 ΔE 0.053
- Dusk #4E5481 ΔE 0.057
- Light Navy Blue #2E5A88 ΔE 0.058
Use #374C69 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.