#374B60
Closest named color: Dark Grey Blue (#29465B). oklch(40.5% 0.044 250.2), rgb(55, 75, 96).
Aa
White text reads best on this color (8.98:1).
About this color
#374B60 is a dark, muted blue. In OKLCH its lightness is 41%, its chroma 0.044 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.026 away. White text reads best on it, at 8.98:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.33:1 |
| White text | 8.98:1 |
Values
| HEX | #374B60 |
| RGB | rgb(55, 75, 96) |
| HSL | hsl(211, 27%, 30%) |
| OKLCH | oklch(40.5% 0.044 250.2) |
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 #374B60 | 8.98:1 | AAA | Lc -95.0 | Preferred for body text |
| Black text on #374B60 | 2.33:1 | Fails | Lc 13.4 | Not readable |
| #374B60 text on white | 8.98:1 | AAA | Lc 90.6 | Preferred for body text |
| #374B60 text on black | 2.33:1 | Fails | Lc -11.7 | 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
#E6EAEF
oklch(93.5% 0.008 253.9)
-
Step 200
200
#D2DAE2
oklch(88.5% 0.014 248)
-
Step 300
300
#B5C2D1
oklch(80.9% 0.026 251.9)
-
Step 400
400
#8EA3BA
oklch(70.7% 0.041 250.8)
-
Step 500
500
#728CA8
oklch(63% 0.052 250.5)
-
Step 600
600
#5A7694
oklch(55.6% 0.057 250.6)
-
Step 700
700
#4A637E
oklch(49.1% 0.053 250.8)
-
Step 800
800 (this color)
#374B60
oklch(40.5% 0.044 250.2)
-
Step 900
900
#344353
oklch(37.7% 0.034 250.4)
-
Step 950
950
#1F2731
oklch(27% 0.022 254.2)
#374B60 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) | #434B61 | 0.017 |
| Deuteranopia (no green cones) | #3E4760 | 0.015 |
| Tritanopia (no blue cones) | #285052 | 0.038 |
| Achromatopsia (no color) | #494949 | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374B60
#374B60
oklch(40.5% 0.044 250.2)
- #58452F
#58452F
oklch(40.5% 0.043 70.2)
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 #374B60, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.026
- Charcoal #264653 ΔE 0.035
- Dark Slate Gray #2F4F4F ΔE 0.038
- Charcoal Grey #3C4142 ΔE 0.051
- Deep Teal #00555A ΔE 0.052
- YInMn Blue #415A77 ΔE 0.056
- Dark Teal #014D4E ΔE 0.058
- Light Navy #155084 ΔE 0.063
Use #374B60 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.