#2F4066
Closest named color: Dark Grey Blue (#29465B). oklch(37.6% 0.069 265), rgb(47, 64, 102).
Aa
White text reads best on this color (10.26:1).
About this color
#2F4066 is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.069 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.031 away. White text reads best on it, at 10.26:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.04:1 |
| White text | 10.26:1 |
Values
| HEX | #2F4066 |
| RGB | rgb(47, 64, 102) |
| HSL | hsl(221, 37%, 29%) |
| OKLCH | oklch(37.6% 0.069 265) |
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 #2F4066 | 10.26:1 | AAA | Lc -97.8 | Preferred for body text |
| Black text on #2F4066 | 2.04:1 | Fails | Lc 10.2 | Not readable |
| #2F4066 text on white | 10.26:1 | AAA | Lc 93.7 | Preferred for body text |
| #2F4066 text on black | 2.04:1 | Fails | Lc -8.8 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF4
oklch(93.6% 0.015 264.5)
-
Step 200
200
#D0D9ED
oklch(88.5% 0.029 266.4)
-
Step 300
300
#B0C1E3
oklch(80.9% 0.052 264.2)
-
Step 400
400
#87A0D5
oklch(70.7% 0.083 264.8)
-
Step 500
500
#6A88CA
oklch(63.2% 0.106 264.9)
-
Step 600
600
#5271B7
oklch(55.7% 0.115 264.9)
-
Step 700
700
#425E9D
oklch(49.1% 0.107 264.7)
-
Step 800
800
#374D80
oklch(42.8% 0.089 265.2)
-
Step 900
900 (this color)
#2F4066
oklch(37.6% 0.069 265)
-
Step 950
950
#1C263C
oklch(27.1% 0.044 265)
#2F4066 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) | #314368 | 0.010 |
| Deuteranopia (no green cones) | #2B3E65 | 0.009 |
| Tritanopia (no blue cones) | #16484E | 0.062 |
| Achromatopsia (no color) | #414141 | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F4066
#2F4066
oklch(37.6% 0.069 265)
- #523E0D
#523E0D
oklch(37.6% 0.069 85.2)
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 #2F4066, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.031
- Twilight Blue #0A437A ΔE 0.044
- Charcoal #264653 ΔE 0.044
- Prussian Blue #1D3557 ΔE 0.049
- Dark Blue Grey #1F3B4D ΔE 0.051
- Marine Blue #01386A ΔE 0.052
- Light Navy #155084 ΔE 0.063
- Midnight Green #073B4C ΔE 0.064
Use #2F4066 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.