#374C67
Closest named color: Dark Grey Blue (#29465B). oklch(41.1% 0.053 255), rgb(55, 76, 103).
Aa
White text reads best on this color (8.77:1).
About this color
#374C67 is a dark, muted blue. In OKLCH its lightness is 41%, its chroma 0.053 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.033 away. White text reads best on it, at 8.77:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | muted (0.053) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.39:1 |
| White text | 8.77:1 |
Values
| HEX | #374C67 |
| RGB | rgb(55, 76, 103) |
| HSL | hsl(214, 30%, 31%) |
| OKLCH | oklch(41.1% 0.053 255) |
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 #374C67 | 8.77:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #374C67 | 2.39:1 | Fails | Lc 14.0 | Not readable |
| #374C67 text on white | 8.77:1 | AAA | Lc 90.0 | Preferred for body text |
| #374C67 text on black | 2.39:1 | Fails | Lc -12.3 | 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
#B4C2D5
oklch(80.9% 0.031 256)
-
Step 400
400
#8CA3BF
oklch(70.7% 0.049 253.5)
-
Step 500
500
#708CAF
oklch(63.2% 0.062 254.3)
-
Step 600
600
#58759B
oklch(55.5% 0.068 255.4)
-
Step 700
700
#486284
oklch(49% 0.063 255.4)
-
Step 800
800 (this color)
#374C67
oklch(41.1% 0.053 255)
-
Step 900
900
#334357
oklch(37.8% 0.04 254.3)
-
Step 950
950
#1E2733
oklch(27% 0.026 255.7)
#374C67 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) | #424D68 | 0.016 |
| Deuteranopia (no green cones) | #3C4966 | 0.011 |
| Tritanopia (no blue cones) | #255255 | 0.046 |
| Achromatopsia (no color) | #4B4B4B | 0.053 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374C67
#374C67
oklch(41.1% 0.053 255)
- #5B4729
#5B4729
oklch(41.2% 0.052 76.6)
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 #374C67, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.033
- Charcoal #264653 ΔE 0.044
- Dark Slate Gray #2F4F4F ΔE 0.047
- YInMn Blue #415A77 ΔE 0.049
- Light Navy #155084 ΔE 0.054
- Deep Sea Blue #015482 ΔE 0.055
- Deep Teal #00555A ΔE 0.057
- Dusk #4E5481 ΔE 0.059
Use #374C67 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.