#2B4070
Closest named color: Twilight Blue (#0A437A). oklch(37.9% 0.086 264.8), rgb(43, 64, 112).
Aa
White text reads best on this color (10.14:1).
About this color
#2B4070 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.086 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.030 away. White text reads best on it, at 10.14:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.07:1 |
| White text | 10.14:1 |
Values
| HEX | #2B4070 |
| RGB | rgb(43, 64, 112) |
| HSL | hsl(222, 45%, 30%) |
| OKLCH | oklch(37.9% 0.086 264.8) |
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 #2B4070 | 10.14:1 | AAA | Lc -97.5 | Preferred for body text |
| Black text on #2B4070 | 2.07:1 | Fails | Lc 10.5 | Not readable |
| #2B4070 text on white | 10.14:1 | AAA | Lc 93.4 | Preferred for body text |
| #2B4070 text on black | 2.07:1 | Fails | Lc -9.1 | 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
#F2F5FB
oklch(97% 0.009 264.5)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CDD9F2
oklch(88.4% 0.037 265.1)
-
Step 300
300
#ACC1EB
oklch(80.9% 0.064 264.1)
-
Step 400
400
#819FE2
oklch(70.7% 0.104 265.4)
-
Step 500
500
#6186D9
oklch(63% 0.132 264.7)
-
Step 600
600
#496EC7
oklch(55.6% 0.144 265.1)
-
Step 700
700
#3A5CAC
oklch(49.2% 0.134 264.6)
-
Step 800
800
#304B8B
oklch(42.6% 0.111 264.9)
-
Step 900
900 (this color)
#2B4070
oklch(37.9% 0.086 264.8)
-
Step 950
950
#192541
oklch(26.9% 0.055 265.3)
#2B4070 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) | #2B4572 | 0.015 |
| Deuteranopia (no green cones) | #223E6F | 0.013 |
| Tritanopia (no blue cones) | #004B52 | 0.077 |
| Achromatopsia (no color) | #414141 | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4070
#2B4070
oklch(37.9% 0.086 264.8)
- #553E00
#553E00
oklch(37.9% 0.078 84.8)
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 #2B4070, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.030
- Dark Grey Blue #29465B ΔE 0.045
- Marine Blue #01386A ΔE 0.047
- Light Navy #155084 ΔE 0.053
- Cobalt #1E488F ΔE 0.054
- Prussian Blue #1D3557 ΔE 0.056
- Charcoal #264653 ΔE 0.059
- Deep Sea Blue #015482 ΔE 0.062
Use #2B4070 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.