#2B4D64
Closest named color: Dark Grey Blue (#29465B). oklch(40.5% 0.056 239.7), rgb(43, 77, 100).
Aa
White text reads best on this color (8.94:1).
About this color
#2B4D64 is a dark, muted blue. In OKLCH its lightness is 40%, its chroma 0.056 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.025 away. White text reads best on it, at 8.94:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.34:1 |
| White text | 8.94:1 |
Values
| HEX | #2B4D64 |
| RGB | rgb(43, 77, 100) |
| HSL | hsl(204, 40%, 28%) |
| OKLCH | oklch(40.5% 0.056 239.7) |
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 #2B4D64 | 8.94:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #2B4D64 | 2.34:1 | Fails | Lc 13.6 | Not readable |
| #2B4D64 text on white | 8.94:1 | AAA | Lc 90.4 | Preferred for body text |
| #2B4D64 text on black | 2.34:1 | Fails | Lc -11.9 | 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 800.
-
Step 50
50
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CFDBE4
oklch(88.5% 0.018 240)
-
Step 300
300
#AEC4D4
oklch(80.9% 0.033 239.5)
-
Step 400
400
#83A6BE
oklch(70.8% 0.052 238.4)
-
Step 500
500
#648FAE
oklch(63.1% 0.066 240.5)
-
Step 600
600
#4A7999
oklch(55.6% 0.072 239.6)
-
Step 700
700
#3B6683
oklch(49.2% 0.067 239.6)
-
Step 800
800 (this color)
#2B4D64
oklch(40.5% 0.056 239.7)
-
Step 900
900
#2C4556
oklch(37.8% 0.042 239.1)
-
Step 950
950
#1A2833
oklch(26.9% 0.028 242.7)
#2B4D64 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) | #434D65 | 0.031 |
| Deuteranopia (no green cones) | #3B4764 | 0.026 |
| Tritanopia (no blue cones) | #065355 | 0.045 |
| Achromatopsia (no color) | #494949 | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4D64
#2B4D64
oklch(40.5% 0.056 239.7)
- #5F4229
#5F4229
oklch(40.5% 0.055 61.1)
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 #2B4D64, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.025
- Charcoal #264653 ΔE 0.034
- Dark Slate Gray #2F4F4F ΔE 0.039
- Deep Teal #00555A ΔE 0.043
- Dark Teal #014D4E ΔE 0.051
- Deep Sea Blue #015482 ΔE 0.052
- Light Navy #155084 ΔE 0.054
- YInMn Blue #415A77 ΔE 0.057
Use #2B4D64 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.