#2B4B65
Closest named color: Dark Grey Blue (#29465B). oklch(40% 0.058 244.5), rgb(43, 75, 101).
Aa
White text reads best on this color (9.14:1).
About this color
#2B4B65 is a dark, muted blue. In OKLCH its lightness is 40%, its chroma 0.058 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.021 away. White text reads best on it, at 9.14:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.29:1 |
| White text | 9.14:1 |
Values
| HEX | #2B4B65 |
| RGB | rgb(43, 75, 101) |
| HSL | hsl(207, 40%, 28%) |
| OKLCH | oklch(40% 0.058 244.5) |
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 #2B4B65 | 9.14:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #2B4B65 | 2.29:1 | Fails | Lc 13.0 | Not readable |
| #2B4B65 text on white | 9.14:1 | AAA | Lc 90.9 | Preferred for body text |
| #2B4B65 text on black | 2.29:1 | Fails | Lc -11.4 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF2
oklch(93.6% 0.013 244.3)
-
Step 200
200
#CCDBE8
oklch(88.4% 0.024 244.2)
-
Step 300
300
#AAC4DB
oklch(80.8% 0.043 245.1)
-
Step 400
400
#7BA6CA
oklch(70.7% 0.07 244.3)
-
Step 500
500
#588FBC
oklch(63% 0.09 244.6)
-
Step 600
600
#3C79A8
oklch(55.6% 0.097 244.1)
-
Step 700
700
#2E6590
oklch(49% 0.09 244.8)
-
Step 800
800
#275375
oklch(42.7% 0.075 244.2)
-
Step 900
900 (this color)
#2B4B65
oklch(40% 0.058 244.5)
-
Step 950
950
#162837
oklch(26.9% 0.037 244.9)
#2B4B65 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) | #404B66 | 0.027 |
| Deuteranopia (no green cones) | #384565 | 0.023 |
| Tritanopia (no blue cones) | #055154 | 0.048 |
| Achromatopsia (no color) | #484848 | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4B65
#2B4B65
oklch(40% 0.058 244.5)
- #5E4124
#5E4124
oklch(40.1% 0.059 64.8)
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 #2B4B65, 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 0.033
- Dark Slate Gray #2F4F4F ΔE 0.044
- Deep Teal #00555A ΔE 0.049
- Light Navy #155084 ΔE 0.052
- Deep Sea Blue #015482 ΔE 0.052
- Dark Teal #014D4E ΔE 0.054
- Twilight Blue #0A437A ΔE 0.055
Use #2B4B65 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.