#2B3F67
Closest named color: Dark Grey Blue (#29465B). oklch(37.1% 0.074 263.1), rgb(43, 63, 103).
Aa
White text reads best on this color (10.44:1).
About this color
#2B3F67 is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.074 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.034 away. White text reads best on it, at 10.44:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.00:1 |
| White text | 10.44:1 |
Values
| HEX | #2B3F67 |
| RGB | rgb(43, 63, 103) |
| HSL | hsl(220, 41%, 29%) |
| OKLCH | oklch(37.1% 0.074 263.1) |
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 #2B3F67 | 10.44:1 | AAA | Lc -98.1 | Preferred for body text |
| Black text on #2B3F67 | 2.00:1 | Fails | Lc 9.8 | Not readable |
| #2B3F67 text on white | 10.44:1 | AAA | Lc 94.1 | Preferred for body text |
| #2B3F67 text on black | 2.00:1 | Fails | Lc -8.4 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CFDAEE
oklch(88.6% 0.03 262.5)
-
Step 300
300
#AEC1E5
oklch(80.9% 0.055 263.2)
-
Step 400
400
#84A1D8
oklch(70.8% 0.087 262.8)
-
Step 500
500
#6588CE
oklch(63.1% 0.113 263.3)
-
Step 600
600
#4C71BB
oklch(55.6% 0.123 262.9)
-
Step 700
700
#3D5EA1
oklch(49% 0.114 263.1)
-
Step 800
800
#334D83
oklch(42.7% 0.095 263.5)
-
Step 900
900 (this color)
#2B3F67
oklch(37.1% 0.074 263.1)
-
Step 950
950
#1A263D
oklch(27% 0.046 262.7)
#2B3F67 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) | #2F4369 | 0.014 |
| Deuteranopia (no green cones) | #273D66 | 0.009 |
| Tritanopia (no blue cones) | #07484E | 0.066 |
| Achromatopsia (no color) | #3F3F3F | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B3F67
#2B3F67
oklch(37.1% 0.074 263.1)
- #533C04
#533C04
oklch(37.2% 0.074 83.2)
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 #2B3F67, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.034
- Twilight Blue #0A437A ΔE 0.039
- Prussian Blue #1D3557 ΔE 0.045
- Marine Blue #01386A ΔE 0.045
- Charcoal #264653 ΔE 0.047
- Dark Blue Grey #1F3B4D ΔE 0.049
- Midnight Green #073B4C ΔE 0.061
- Light Navy #155084 ΔE 0.063
Use #2B3F67 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.