#2B4970
Closest named color: Dark Grey Blue (#29465B). oklch(40.1% 0.075 255.6), rgb(43, 73, 112).
Aa
White text reads best on this color (9.17:1).
About this color
#2B4970 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.075 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.036 away. White text reads best on it, at 9.17:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.28:1 |
| White text | 9.17:1 |
Values
| HEX | #2B4970 |
| RGB | rgb(43, 73, 112) |
| HSL | hsl(214, 45%, 30%) |
| OKLCH | oklch(40.1% 0.075 255.6) |
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 #2B4970 | 9.17:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #2B4970 | 2.28:1 | Fails | Lc 13.0 | Not readable |
| #2B4970 text on white | 9.17:1 | AAA | Lc 91.0 | Preferred for body text |
| #2B4970 text on black | 2.28:1 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EBF5
oklch(93.7% 0.016 253.9)
-
Step 200
200
#CCDBEE
oklch(88.6% 0.031 254.3)
-
Step 300
300
#A9C3E5
oklch(80.9% 0.056 255.2)
-
Step 400
400
#7BA3D9
oklch(70.7% 0.091 256.1)
-
Step 500
500
#588BCE
oklch(63% 0.116 255.7)
-
Step 600
600
#3D74BB
oklch(55.6% 0.125 255.7)
-
Step 700
700
#2E61A1
oklch(49% 0.117 255.4)
-
Step 800
800
#275083
oklch(42.8% 0.097 255.1)
-
Step 900
900 (this color)
#2B4970
oklch(40.1% 0.075 255.6)
-
Step 950
950
#16273D
oklch(27% 0.047 255.4)
#2B4970 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) | #394B72 | 0.020 |
| Deuteranopia (no green cones) | #30456F | 0.013 |
| Tritanopia (no blue cones) | #005257 | 0.065 |
| Achromatopsia (no color) | #484848 | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4970
#2B4970
oklch(40.1% 0.075 255.6)
- #5F4110
#5F4110
oklch(40% 0.075 75)
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 #2B4970, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.036
- Light Navy #155084 ΔE 0.037
- Twilight Blue #0A437A ΔE 0.039
- Deep Sea Blue #015482 ΔE 0.043
- Charcoal #264653 ΔE 0.050
- Dusk Blue #26538D ΔE 0.052
- Cobalt #1E488F ΔE 0.054
- Light Navy Blue #2E5A88 ΔE 0.059
Use #2B4970 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.