#374A62
Closest named color: Dark Grey Blue (#29465B). oklch(40.4% 0.047 254.6), rgb(55, 74, 98).
Aa
White text reads best on this color (9.05:1).
About this color
#374A62 is a dark, muted blue. In OKLCH its lightness is 40%, its chroma 0.047 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.026 away. White text reads best on it, at 9.05:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | muted (0.047) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.31:1 |
| White text | 9.05:1 |
Values
| HEX | #374A62 |
| RGB | rgb(55, 74, 98) |
| HSL | hsl(213, 28%, 30%) |
| OKLCH | oklch(40.4% 0.047 254.6) |
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 #374A62 | 9.05:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #374A62 | 2.31:1 | Fails | Lc 13.2 | Not readable |
| #374A62 text on white | 9.05:1 | AAA | Lc 90.8 | Preferred for body text |
| #374A62 text on black | 2.31:1 | Fails | Lc -11.5 | 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
#D2DAE3
oklch(88.5% 0.015 251.2)
-
Step 300
300
#B5C2D3
oklch(80.9% 0.028 255.1)
-
Step 400
400
#8EA2BC
oklch(70.6% 0.044 255.1)
-
Step 500
500
#728CAC
oklch(63.2% 0.057 253.9)
-
Step 600
600
#5B7597
oklch(55.6% 0.061 255.3)
-
Step 700
700
#4A6281
oklch(49% 0.058 255.1)
-
Step 800
800 (this color)
#374A62
oklch(40.4% 0.047 254.6)
-
Step 900
900
#344355
oklch(37.7% 0.037 253.3)
-
Step 950
950
#1F2732
oklch(27% 0.024 256.4)
#374A62 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) | #414B63 | 0.015 |
| Deuteranopia (no green cones) | #3C4761 | 0.011 |
| Tritanopia (no blue cones) | #284F52 | 0.041 |
| Achromatopsia (no color) | #494949 | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374A62
#374A62
oklch(40.4% 0.047 254.6)
- #58452B
#58452B
oklch(40.4% 0.047 74.5)
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 #374A62, 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 0.036
- Dark Slate Gray #2F4F4F ΔE 0.043
- Charcoal Grey #3C4142 ΔE 0.054
- Deep Teal #00555A ΔE 0.056
- YInMn Blue #415A77 ΔE 0.057
- Light Navy #155084 ΔE 0.061
- Dark Teal #014D4E ΔE 0.061
Use #374A62 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.