#2B4A63
Closest named color: Dark Grey Blue (#29465B). oklch(39.7% 0.056 244.2), rgb(43, 74, 99).
Aa
White text reads best on this color (9.28:1).
About this color
#2B4A63 is a dark, muted blue. In OKLCH its lightness is 40%, its chroma 0.056 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.017 away. White text reads best on it, at 9.28:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.26:1 |
| White text | 9.28:1 |
Values
| HEX | #2B4A63 |
| RGB | rgb(43, 74, 99) |
| HSL | hsl(207, 39%, 28%) |
| OKLCH | oklch(39.7% 0.056 244.2) |
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 #2B4A63 | 9.28:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #2B4A63 | 2.26:1 | Fails | Lc 12.6 | Not readable |
| #2B4A63 text on white | 9.28:1 | AAA | Lc 91.3 | Preferred for body text |
| #2B4A63 text on black | 2.26:1 | Fails | Lc -11.0 | 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
#E3EBF2
oklch(93.6% 0.013 244.3)
-
Step 200
200
#CDDBE8
oklch(88.5% 0.023 246.1)
-
Step 300
300
#AAC4DA
oklch(80.8% 0.042 243.8)
-
Step 400
400
#7DA6C8
oklch(70.8% 0.067 243.9)
-
Step 500
500
#5A8FBA
oklch(63% 0.086 244.2)
-
Step 600
600
#3E79A6
oklch(55.6% 0.094 243.7)
-
Step 700
700
#30658F
oklch(49% 0.088 245)
-
Step 800
800
#295374
oklch(42.8% 0.072 244.4)
-
Step 900
900 (this color)
#2B4A63
oklch(39.7% 0.056 244.2)
-
Step 950
950
#172837
oklch(26.9% 0.036 246.3)
#2B4A63 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) | #3F4A64 | 0.026 |
| Deuteranopia (no green cones) | #384563 | 0.021 |
| Tritanopia (no blue cones) | #095052 | 0.048 |
| Achromatopsia (no color) | #474747 | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4A63
#2B4A63
oklch(39.7% 0.056 244.2)
- #5C4025
#5C4025
oklch(39.6% 0.056 64)
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 #2B4A63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.017
- Charcoal #264653 ΔE 0.029
- Dark Slate Gray #2F4F4F ΔE 0.043
- Deep Teal #00555A ΔE 0.049
- Dark Teal #014D4E ΔE 0.052
- Light Navy #155084 ΔE 0.055
- Deep Sea Blue #015482 ΔE 0.056
- Twilight Blue #0A437A ΔE 0.056
Use #2B4A63 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.