#374E68
Closest named color: Dark Grey Blue (#29465B). oklch(41.7% 0.052 252.1), rgb(55, 78, 104).
Aa
White text reads best on this color (8.56:1).
About this color
#374E68 is a dark, muted blue. In OKLCH its lightness is 42%, its chroma 0.052 and its hue 252°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.037 away. White text reads best on it, at 8.56:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.45:1 |
| White text | 8.56:1 |
Values
| HEX | #374E68 |
| RGB | rgb(55, 78, 104) |
| HSL | hsl(212, 31%, 31%) |
| OKLCH | oklch(41.7% 0.052 252.1) |
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 #374E68 | 8.56:1 | AAA | Lc -93.9 | Preferred for body text |
| Black text on #374E68 | 2.45:1 | Fails | Lc 14.6 | Not readable |
| #374E68 text on white | 8.56:1 | AAA | Lc 89.4 | Fine for body text |
| #374E68 text on black | 2.45:1 | Fails | Lc -12.8 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E6EAF0
oklch(93.6% 0.009 258.3)
-
Step 200
200
#D1DAE4
oklch(88.4% 0.017 250.9)
-
Step 300
300
#B3C2D4
oklch(80.8% 0.03 253)
-
Step 400
400
#8BA3BF
oklch(70.7% 0.049 252.5)
-
Step 500
500
#6E8CAF
oklch(63% 0.063 252.6)
-
Step 600
600
#56769A
oklch(55.6% 0.067 251.9)
-
Step 700
700
#466384
oklch(49.1% 0.063 252.3)
-
Step 800
800 (this color)
#374E68
oklch(41.7% 0.052 252.1)
-
Step 900
900
#324357
oklch(37.7% 0.041 252.9)
-
Step 950
950
#1D2733
oklch(26.9% 0.027 253.3)
#374E68 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) | #444F69 | 0.019 |
| Deuteranopia (no green cones) | #3E4A67 | 0.014 |
| Tritanopia (no blue cones) | #245457 | 0.045 |
| Achromatopsia (no color) | #4C4C4C | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374E68
#374E68
oklch(41.7% 0.052 252.1)
- #5E472B
#5E472B
oklch(41.6% 0.052 71)
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 #374E68, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.037
- YInMn Blue #415A77 ΔE 0.044
- Dark Slate Gray #2F4F4F ΔE 0.046
- Charcoal #264653 ΔE 0.047
- Deep Sea Blue #015482 ΔE 0.053
- Light Navy #155084 ΔE 0.053
- Deep Teal #00555A ΔE 0.055
- Dusty Grape #545775 ΔE 0.055
Use #374E68 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.