#2F4059
Closest named color: Dark Grey Blue (#29465B). oklch(36.8% 0.049 257.9), rgb(47, 64, 89).
Aa
White text reads best on this color (10.50:1).
About this color
#2F4059 is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.049 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.019 away. White text reads best on it, at 10.50:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.99:1 |
| White text | 10.50:1 |
Values
| HEX | #2F4059 |
| RGB | rgb(47, 64, 89) |
| HSL | hsl(216, 31%, 27%) |
| OKLCH | oklch(36.8% 0.049 257.9) |
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 #2F4059 | 10.50:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #2F4059 | 1.99:1 | Fails | Lc 9.6 | Not readable |
| #2F4059 text on white | 10.50:1 | AAA | Lc 94.3 | Preferred for body text |
| #2F4059 text on black | 1.99:1 | Fails | Lc -8.2 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E6EAF1
oklch(93.6% 0.01 261.8)
-
Step 200
200
#D1DAE7
oklch(88.5% 0.02 257.5)
-
Step 300
300
#B2C2D9
oklch(80.9% 0.037 257.4)
-
Step 400
400
#8AA2C5
oklch(70.6% 0.058 257.7)
-
Step 500
500
#6D8BB7
oklch(63.1% 0.075 257.8)
-
Step 600
600
#5574A3
oklch(55.5% 0.082 258.5)
-
Step 700
700
#45628B
oklch(49.2% 0.075 257.1)
-
Step 800
800
#395071
oklch(42.7% 0.062 257.4)
-
Step 900
900 (this color)
#2F4059
oklch(36.8% 0.049 257.9)
-
Step 950
950
#1D2736
oklch(27% 0.031 258.3)
#2F4059 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) | #37415A | 0.012 |
| Deuteranopia (no green cones) | #323D58 | 0.010 |
| Tritanopia (no blue cones) | #1F4549 | 0.042 |
| Achromatopsia (no color) | #3F3F3F | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F4059
#2F4059
oklch(36.8% 0.049 257.9)
- #4E3C20
#4E3C20
oklch(36.9% 0.049 77.3)
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 #2F4059, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.019
- Charcoal #264653 ΔE 0.027
- Dark Blue Grey #1F3B4D ΔE 0.034
- Onyx #343A40 ΔE 0.043
- Charcoal Grey #3C4142 ΔE 0.044
- Prussian Blue #1D3557 ΔE 0.045
- Midnight Green #073B4C ΔE 0.050
- Gunmetal #293241 ΔE 0.056
Use #2F4059 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.