#2B405B
Closest named color: Dark Grey Blue (#29465B). oklch(36.7% 0.054 255.1), rgb(43, 64, 91).
Aa
White text reads best on this color (10.56:1).
About this color
#2B405B is a dark, muted blue. In OKLCH its lightness is 37%, its chroma 0.054 and its hue 255°. 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 10.56:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.98:1 |
| White text | 10.56:1 |
Values
| HEX | #2B405B |
| RGB | rgb(43, 64, 91) |
| HSL | hsl(214, 36%, 26%) |
| OKLCH | oklch(36.7% 0.054 255.1) |
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 #2B405B | 10.56:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #2B405B | 1.98:1 | Fails | Lc 9.5 | Not readable |
| #2B405B text on white | 10.56:1 | AAA | Lc 94.4 | Preferred for body text |
| #2B405B text on black | 1.98:1 | Fails | Lc -8.1 | 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
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#CFDAE8
oklch(88.4% 0.023 254.4)
-
Step 300
300
#B0C2DB
oklch(80.8% 0.041 256.6)
-
Step 400
400
#86A3C9
oklch(70.7% 0.065 255.3)
-
Step 500
500
#678CBB
oklch(63.1% 0.083 254.8)
-
Step 600
600
#4E75A7
oklch(55.5% 0.09 255.1)
-
Step 700
700
#3F628F
oklch(49% 0.083 255.2)
-
Step 800
800
#345074
oklch(42.6% 0.069 255.2)
-
Step 900
900 (this color)
#2B405B
oklch(36.7% 0.054 255.1)
-
Step 950
950
#1B2737
oklch(26.9% 0.034 255.8)
#2B405B 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) | #35415C | 0.015 |
| Deuteranopia (no green cones) | #303D5A | 0.011 |
| Tritanopia (no blue cones) | #154649 | 0.048 |
| Achromatopsia (no color) | #3F3F3F | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B405B
#2B405B
oklch(36.7% 0.054 255.1)
- #4F3B1C
#4F3B1C
oklch(36.7% 0.054 76.7)
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 #2B405B, 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 0.028
- Dark Blue Grey #1F3B4D ΔE 0.032
- Prussian Blue #1D3557 ΔE 0.041
- Onyx #343A40 ΔE 0.046
- Midnight Green #073B4C ΔE 0.047
- Charcoal Grey #3C4142 ΔE 0.049
- Marine Blue #01386A ΔE 0.055
Use #2B405B 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.