#374E61
Closest named color: Dark Grey Blue (#29465B). oklch(41.3% 0.043 244), rgb(55, 78, 97).
Aa
White text reads best on this color (8.66:1).
About this color
#374E61 is a dark, muted blue. In OKLCH its lightness is 41%, its chroma 0.043 and its hue 244°. 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 8.66:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.42:1 |
| White text | 8.66:1 |
Values
| HEX | #374E61 |
| RGB | rgb(55, 78, 97) |
| HSL | hsl(207, 28%, 30%) |
| OKLCH | oklch(41.3% 0.043 244) |
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 #374E61 | 8.66:1 | AAA | Lc -94.2 | Preferred for body text |
| Black text on #374E61 | 2.42:1 | Fails | Lc 14.3 | Not readable |
| #374E61 text on white | 8.66:1 | AAA | Lc 89.7 | Fine for body text |
| #374E61 text on black | 2.42:1 | Fails | Lc -12.6 | 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
#F4F6F7
oklch(97.2% 0.003 228.8)
-
Step 100
100
#E6EAEE
oklch(93.5% 0.007 247.9)
-
Step 200
200
#D2DAE2
oklch(88.5% 0.014 248)
-
Step 300
300
#B4C3D0
oklch(81% 0.025 244.2)
-
Step 400
400
#8CA4B8
oklch(70.7% 0.04 243.5)
-
Step 500
500
#6F8DA7
oklch(63% 0.052 244.9)
-
Step 600
600
#577792
oklch(55.5% 0.056 244.5)
-
Step 700
700
#47647C
oklch(49% 0.052 244.1)
-
Step 800
800 (this color)
#374E61
oklch(41.3% 0.043 244)
-
Step 900
900
#324452
oklch(37.7% 0.033 242.1)
-
Step 950
950
#1E2830
oklch(27.1% 0.02 242.7)
#374E61 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) | #464E62 | 0.021 |
| Deuteranopia (no green cones) | #414A61 | 0.018 |
| Tritanopia (no blue cones) | #275354 | 0.037 |
| Achromatopsia (no color) | #4B4B4B | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374E61
#374E61
oklch(41.3% 0.043 244)
- #5C4633
#5C4633
oklch(41.3% 0.042 62)
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 #374E61, 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
- Dark Slate Gray #2F4F4F ΔE 0.035
- Charcoal #264653 ΔE 0.040
- Deep Teal #00555A ΔE 0.048
- YInMn Blue #415A77 ΔE 0.049
- Charcoal Grey #3C4142 ΔE 0.056
- Dark Teal #014D4E ΔE 0.057
- Petrol #005F6A ΔE 0.058
Use #374E61 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.