#374661
Closest named color: Dark Grey Blue (#29465B). oklch(39.3% 0.05 261.9), rgb(55, 70, 97).
Aa
White text reads best on this color (9.49:1).
About this color
#374661 is a dark, muted blue. In OKLCH its lightness is 39%, its chroma 0.050 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.022 away. White text reads best on it, at 9.49:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.21:1 |
| White text | 9.49:1 |
Values
| HEX | #374661 |
| RGB | rgb(55, 70, 97) |
| HSL | hsl(219, 28%, 30%) |
| OKLCH | oklch(39.3% 0.05 261.9) |
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 #374661 | 9.49:1 | AAA | Lc -96.2 | Preferred for body text |
| Black text on #374661 | 2.21:1 | Fails | Lc 12.0 | Not readable |
| #374661 text on white | 9.49:1 | AAA | Lc 91.9 | Preferred for body text |
| #374661 text on black | 2.21:1 | Fails | Lc -10.5 | 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 900.
-
Step 50
50
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E6EAF1
oklch(93.6% 0.01 261.8)
-
Step 200
200
#D2DAE7
oklch(88.6% 0.02 260.2)
-
Step 300
300
#B4C1DA
oklch(80.9% 0.038 263.6)
-
Step 400
400
#8CA1C7
oklch(70.6% 0.061 262.2)
-
Step 500
500
#708AB8
oklch(63.1% 0.076 261.6)
-
Step 600
600
#5873A4
oklch(55.5% 0.083 261.9)
-
Step 700
700
#48608D
oklch(49% 0.078 262.4)
-
Step 800
800
#3B4F72
oklch(42.7% 0.064 261.2)
-
Step 900
900 (this color)
#374661
oklch(39.3% 0.05 261.9)
-
Step 950
950
#1E2736
oklch(27.1% 0.031 260.5)
#374661 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) | #3C4862 | 0.010 |
| Deuteranopia (no green cones) | #384460 | 0.006 |
| Tritanopia (no blue cones) | #294C4F | 0.046 |
| Achromatopsia (no color) | #464646 | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #374661
#374661
oklch(39.3% 0.05 261.9)
- #534325
#534325
oklch(39.2% 0.05 82.1)
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 #374661, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.022
- Charcoal #264653 ΔE 0.034
- Dark Slate Gray #2F4F4F ΔE 0.050
- Charcoal Grey #3C4142 ΔE 0.051
- Dark Blue Grey #1F3B4D ΔE 0.058
- Onyx #343A40 ΔE 0.061
- Twilight Blue #0A437A ΔE 0.061
- Light Navy #155084 ΔE 0.064
Use #374661 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.