#2F394A
Closest named color: Onyx (#343A40). oklch(34.3% 0.033 260.9), rgb(47, 57, 74).
Aa
White text reads best on this color (11.63:1).
About this color
#2F394A is a dark, muted blue. In OKLCH its lightness is 34%, its chroma 0.033 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Onyx (#343A40), ΔE 0.020 away. White text reads best on it, at 11.63:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | muted (0.033) |
| Temperature | cool |
| Nearest name | Onyx (#343A40) |
| Black text | 1.80:1 |
| White text | 11.63:1 |
Values
| HEX | #2F394A |
| RGB | rgb(47, 57, 74) |
| HSL | hsl(218, 22%, 24%) |
| OKLCH | oklch(34.3% 0.033 260.9) |
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 #2F394A | 11.63:1 | AAA | Lc -100.4 | Preferred for body text |
| Black text on #2F394A | 1.80:1 | Fails | Lc 0.0 | Not readable |
| #2F394A text on white | 11.63:1 | AAA | Lc 96.8 | Preferred for body text |
| #2F394A text on black | 1.80:1 | Fails | Lc 0.0 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAEF
oklch(93.6% 0.007 260.7)
-
Step 200
200
#D4D9E2
oklch(88.4% 0.013 262.4)
-
Step 300
300
#B8C1D1
oklch(80.9% 0.025 262.1)
-
Step 400
400
#93A1BA
oklch(70.6% 0.04 262.1)
-
Step 500
500
#788AA9
oklch(63% 0.051 261.2)
-
Step 600
600
#617494
oklch(55.6% 0.055 260.7)
-
Step 700
700
#50617E
oklch(49% 0.051 261)
-
Step 800
800
#424F66
oklch(42.6% 0.042 261.7)
-
Step 900
900 (this color)
#2F394A
oklch(34.3% 0.033 260.9)
-
Step 950
950
#212731
oklch(27.1% 0.021 260.6)
#2F394A 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) | #333A4B | 0.007 |
| Deuteranopia (no green cones) | #30374A | 0.007 |
| Tritanopia (no blue cones) | #273D3F | 0.030 |
| Achromatopsia (no color) | #393939 | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F394A
#2F394A
oklch(34.3% 0.033 260.9)
- #413725
#413725
oklch(34.2% 0.032 81.9)
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 #2F394A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.020
- Dark Blue Grey #1F3B4D ΔE 0.021
- Gunmetal #293241 ΔE 0.028
- Prussian Blue #1D3557 ΔE 0.038
- Midnight Green #073B4C ΔE 0.039
- Space Cadet #2B2D42 ΔE 0.040
- Charcoal Grey #3C4142 ΔE 0.040
- Charcoal #264653 ΔE 0.041
Use #2F394A 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.