#2B4C63
Closest named color: Dark Grey Blue (#29465B). oklch(40.2% 0.055 240.4), rgb(43, 76, 99).
Aa
White text reads best on this color (9.06:1).
About this color
#2B4C63 is a dark, muted blue. In OKLCH its lightness is 40%, its chroma 0.055 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.021 away. White text reads best on it, at 9.06:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.31:1 |
| White text | 9.06:1 |
Values
| HEX | #2B4C63 |
| RGB | rgb(43, 76, 99) |
| HSL | hsl(205, 39%, 28%) |
| OKLCH | oklch(40.2% 0.055 240.4) |
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 #2B4C63 | 9.06:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #2B4C63 | 2.31:1 | Fails | Lc 13.2 | Not readable |
| #2B4C63 text on white | 9.06:1 | AAA | Lc 90.7 | Preferred for body text |
| #2B4C63 text on black | 2.31:1 | Fails | Lc -11.6 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF1
oklch(93.6% 0.012 239.9)
-
Step 200
200
#CCDCE7
oklch(88.6% 0.023 237.7)
-
Step 300
300
#AAC5D9
oklch(81% 0.041 240.1)
-
Step 400
400
#7BA7C6
oklch(70.8% 0.066 239.6)
-
Step 500
500
#5890B8
oklch(63.1% 0.085 241)
-
Step 600
600
#3B7AA4
oklch(55.6% 0.092 240.4)
-
Step 700
700
#2D668C
oklch(49% 0.085 240.8)
-
Step 800
800
#275472
oklch(42.8% 0.07 240.4)
-
Step 900
900 (this color)
#2B4C63
oklch(40.2% 0.055 240.4)
-
Step 950
950
#162936
oklch(27.1% 0.035 239.7)
#2B4C63 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) | #424C64 | 0.030 |
| Deuteranopia (no green cones) | #3A4663 | 0.025 |
| Tritanopia (no blue cones) | #085254 | 0.045 |
| Achromatopsia (no color) | #494949 | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4C63
#2B4C63
oklch(40.2% 0.055 240.4)
- #5E4129
#5E4129
oklch(40.2% 0.055 60)
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 #2B4C63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.021
- Charcoal #264653 ΔE 0.031
- Dark Slate Gray #2F4F4F ΔE 0.039
- Deep Teal #00555A ΔE 0.044
- Dark Teal #014D4E ΔE 0.050
- Deep Sea Blue #015482 ΔE 0.054
- Light Navy #155084 ΔE 0.055
- Charcoal Grey #3C4142 ΔE 0.058
Use #2B4C63 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.