#2B4F70
Closest named color: Deep Sea Blue (#015482). oklch(41.6% 0.069 247.9), rgb(43, 79, 112).
Aa
White text reads best on this color (8.55:1).
About this color
#2B4F70 is a dark, muted blue. In OKLCH its lightness is 42%, its chroma 0.069 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.036 away. White text reads best on it, at 8.55:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | muted (0.069) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.45:1 |
| White text | 8.55:1 |
Values
| HEX | #2B4F70 |
| RGB | rgb(43, 79, 112) |
| HSL | hsl(209, 45%, 30%) |
| OKLCH | oklch(41.6% 0.069 247.9) |
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 #2B4F70 | 8.55:1 | AAA | Lc -93.8 | Preferred for body text |
| Black text on #2B4F70 | 2.45:1 | Fails | Lc 14.7 | Not readable |
| #2B4F70 text on white | 8.55:1 | AAA | Lc 89.3 | Fine for body text |
| #2B4F70 text on black | 2.45:1 | Fails | Lc -13.0 | 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 800.
-
Step 50
50
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF1
oklch(93.6% 0.011 243.7)
-
Step 200
200
#CEDBE8
oklch(88.6% 0.023 248.1)
-
Step 300
300
#ADC4DA
oklch(81% 0.04 247.1)
-
Step 400
400
#81A5C8
oklch(70.8% 0.065 248)
-
Step 500
500
#608EB9
oklch(63.1% 0.082 247.6)
-
Step 600
600
#4678A6
oklch(55.8% 0.09 247.8)
-
Step 700
700
#37648E
oklch(49% 0.084 248.4)
-
Step 800
800 (this color)
#2B4F70
oklch(41.6% 0.069 247.9)
-
Step 900
900
#29445D
oklch(37.7% 0.054 247.6)
-
Step 950
950
#192836
oklch(27% 0.033 247.4)
#2B4F70 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) | #415071 | 0.028 |
| Deuteranopia (no green cones) | #38496F | 0.022 |
| Tritanopia (no blue cones) | #00575A | 0.058 |
| Achromatopsia (no color) | #4C4C4C | 0.069 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4F70
#2B4F70
oklch(41.6% 0.069 247.9)
- #65441E
#65441E
oklch(41.6% 0.07 67.5)
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 #2B4F70, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.036
- Light Navy #155084 ΔE 0.036
- Dark Grey Blue #29465B ΔE 0.041
- YInMn Blue #415A77 ΔE 0.046
- Light Navy Blue #2E5A88 ΔE 0.047
- Dusk Blue #26538D ΔE 0.047
- Charcoal #264653 ΔE 0.053
- Twilight Blue #0A437A ΔE 0.053
Use #2B4F70 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.