#374B65
Closest named color: Dark Grey Blue (#29465B). oklch(40.8% 0.051 255.3), rgb(55, 75, 101).
Aa
White text reads best on this color (8.91:1).
About this color
#374B65 is a dark, muted blue. In OKLCH its lightness is 41%, its chroma 0.051 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.029 away. White text reads best on it, at 8.91:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.35:1 |
| White text | 8.91:1 |
Values
| HEX | #374B65 |
| RGB | rgb(55, 75, 101) |
| HSL | hsl(214, 29%, 31%) |
| OKLCH | oklch(40.8% 0.051 255.3) |
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 #374B65 | 8.91:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #374B65 | 2.35:1 | Fails | Lc 13.6 | Not readable |
| #374B65 text on white | 8.91:1 | AAA | Lc 90.4 | Preferred for body text |
| #374B65 text on black | 2.35:1 | Fails | Lc -11.9 | 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
#D2DAE4
oklch(88.5% 0.016 253.9)
-
Step 300
300
#B4C2D4
oklch(80.9% 0.03 254.7)
-
Step 400
400
#8DA2BE
oklch(70.6% 0.047 255.7)
-
Step 500
500
#718CAE
oklch(63.2% 0.06 254.4)
-
Step 600
600
#59759A
oklch(55.6% 0.067 255.6)
-
Step 700
700
#496283
oklch(49% 0.061 255.6)
-
Step 800
800 (this color)
#374B65
oklch(40.8% 0.051 255.3)
-
Step 900
900
#334357
oklch(37.8% 0.04 254.3)
-
Step 950
950
#1E2733
oklch(27% 0.026 255.7)
#374B65 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) | #414C66 | 0.015 |
| Deuteranopia (no green cones) | #3C4864 | 0.011 |
| Tritanopia (no blue cones) | #265154 | 0.045 |
| Achromatopsia (no color) | #4A4A4A | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374B65
#374B65
oklch(40.8% 0.051 255.3)
- #5A4629
#5A4629
oklch(40.8% 0.051 75.8)
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 #374B65, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.029
- Charcoal #264653 ΔE 0.041
- Dark Slate Gray #2F4F4F ΔE 0.046
- YInMn Blue #415A77 ΔE 0.053
- Light Navy #155084 ΔE 0.056
- Deep Teal #00555A ΔE 0.057
- Deep Sea Blue #015482 ΔE 0.058
- Charcoal Grey #3C4142 ΔE 0.059
Use #374B65 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.