#2B4685
Closest named color: Cobalt (#1E488F). oklch(40.8% 0.11 264.6), rgb(43, 70, 133).
Aa
White text reads best on this color (9.06:1).
About this color
#2B4685 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.110 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.020 away. White text reads best on it, at 9.06:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.31:1 |
| White text | 9.06:1 |
Values
| HEX | #2B4685 |
| RGB | rgb(43, 70, 133) |
| HSL | hsl(222, 51%, 35%) |
| OKLCH | oklch(40.8% 0.11 264.6) |
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 #2B4685 | 9.06:1 | AAA | Lc -95.0 | Preferred for body text |
| Black text on #2B4685 | 2.31:1 | Fails | Lc 13.4 | Not readable |
| #2B4685 text on white | 9.06:1 | AAA | Lc 90.6 | Preferred for body text |
| #2B4685 text on black | 2.31:1 | Fails | Lc -11.7 | 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
#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
#809FE1
oklch(70.5% 0.103 264.6)
-
Step 500
500
#6186D9
oklch(63% 0.132 264.7)
-
Step 600
600
#486EC7
oklch(55.5% 0.145 264.7)
-
Step 700
700
#3A5CAC
oklch(49.2% 0.134 264.6)
-
Step 800
800 (this color)
#2B4685
oklch(40.8% 0.11 264.6)
-
Step 900
900
#2A3F6F
oklch(37.6% 0.087 264.8)
-
Step 950
950
#192541
oklch(26.9% 0.055 265.3)
#2B4685 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) | #274D87 | 0.020 |
| Deuteranopia (no green cones) | #164584 | 0.020 |
| Tritanopia (no blue cones) | #00545F | 0.090 |
| Achromatopsia (no color) | #494949 | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4685
#2B4685
oklch(40.8% 0.11 264.6)
- #5F4500
#5F4500
oklch(40.8% 0.084 84)
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 #2B4685, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.020
- Light Navy #155084 ΔE 0.032
- Twilight Blue #0A437A ΔE 0.035
- Dusk Blue #26538D ΔE 0.037
- Deep Sea Blue #015482 ΔE 0.046
- Dark Slate Blue #483D8B ΔE 0.047
- Blueberry #464196 ΔE 0.048
- Light Navy Blue #2E5A88 ΔE 0.059
Use #2B4685 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.