#374A4F
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39.5% 0.025 215.7), rgb(55, 74, 79).
Aa
White text reads best on this color (9.31:1).
About this color
#374A4F is a dark close to neutral grey. In OKLCH its lightness is 40%, its chroma 0.025. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.018 away. White text reads best on it, at 9.31:1.
| Hue family | Neutrals |
| Lightness | dark (40%) |
| Chroma | close to neutral grey (0.025) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.25:1 |
| White text | 9.31:1 |
Values
| HEX | #374A4F |
| RGB | rgb(55, 74, 79) |
| HSL | hsl(193, 18%, 26%) |
| OKLCH | oklch(39.5% 0.025 215.7) |
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 #374A4F | 9.31:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #374A4F | 2.25:1 | Fails | Lc 12.5 | Not readable |
| #374A4F text on white | 9.31:1 | AAA | Lc 91.5 | Preferred for body text |
| #374A4F text on black | 2.25:1 | Fails | Lc -10.9 | 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 900.
-
Step 50
50
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E6EBEC
oklch(93.7% 0.006 211)
-
Step 200
200
#D2DBDD
oklch(88.5% 0.01 212.5)
-
Step 300
300
#B4C4C8
oklch(80.9% 0.018 214.4)
-
Step 400
400
#8CA6AD
oklch(70.8% 0.031 215.8)
-
Step 500
500
#6F9098
oklch(63.1% 0.039 214.2)
-
Step 600
600
#577A83
oklch(55.6% 0.042 215.4)
-
Step 700
700
#47676F
oklch(49.2% 0.039 215)
-
Step 800
800
#3A545A
oklch(42.7% 0.033 213.6)
-
Step 900
900 (this color)
#374A4F
oklch(39.5% 0.025 215.7)
-
Step 950
950
#1E292B
oklch(27.1% 0.016 209.9)
#374A4F 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) | #46494F | 0.022 |
| Deuteranopia (no green cones) | #42464F | 0.020 |
| Tritanopia (no blue cones) | #2F4C4B | 0.015 |
| Achromatopsia (no color) | #474747 | 0.025 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374A4F
#374A4F
oklch(39.5% 0.025 215.7)
- #53423D
#53423D
oklch(39.5% 0.025 37)
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 #374A4F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.018
- Charcoal #264653 ΔE 0.028
- Charcoal Grey #3C4142 ΔE 0.030
- Dark Grey Blue #29465B ΔE 0.033
- Dark Teal #014D4E ΔE 0.044
- Deep Teal #00555A ΔE 0.048
- Dark Blue Green #005249 ΔE 0.051
- Onyx #343A40 ΔE 0.052
Use #374A4F 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.