#2B4B94
Closest named color: Cobalt (#1E488F). oklch(43% 0.126 264), rgb(43, 75, 148).
Aa
White text reads best on this color (8.27:1).
About this color
#2B4B94 is a dark, moderately saturated blue. In OKLCH its lightness is 43%, its chroma 0.126 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.018 away. White text reads best on it, at 8.27:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.53:1 |
| White text | 8.27:1 |
Values
| HEX | #2B4B94 |
| RGB | rgb(43, 75, 148) |
| HSL | hsl(222, 55%, 37%) |
| OKLCH | oklch(43% 0.126 264) |
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 #2B4B94 | 8.27:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #2B4B94 | 2.53:1 | Fails | Lc 15.7 | Dividers and decoration only |
| #2B4B94 text on white | 8.27:1 | AAA | Lc 88.3 | Fine for body text |
| #2B4B94 text on black | 2.53:1 | Fails | Lc -13.9 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CCDAF5
oklch(88.6% 0.04 263.7)
-
Step 300
300
#A9C1F1
oklch(81% 0.073 264)
-
Step 400
400
#7B9FEA
oklch(70.7% 0.118 264.1)
-
Step 500
500
#5A85E4
oklch(63.1% 0.151 264.2)
-
Step 600
600
#406DD2
oklch(55.7% 0.164 263.8)
-
Step 700
700
#335AB6
oklch(49.1% 0.153 264.2)
-
Step 800
800 (this color)
#2B4B94
oklch(43% 0.126 264)
-
Step 900
900
#263F75
oklch(37.8% 0.097 263.7)
-
Step 950
950
#172545
oklch(27% 0.063 264.7)
#2B4B94 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) | #235397 | 0.022 |
| Deuteranopia (no green cones) | #064A93 | 0.025 |
| Tritanopia (no blue cones) | #005C68 | 0.102 |
| Achromatopsia (no color) | #4E4E4E | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4B94
#2B4B94
oklch(43% 0.126 264)
- #664B00
#664B00
oklch(43% 0.088 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 #2B4B94, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.018
- Dusk Blue #26538D ΔE 0.027
- Light Navy #155084 ΔE 0.036
- Blueberry #464196 ΔE 0.041
- Deep Sea Blue #015482 ΔE 0.049
- Dark Slate Blue #483D8B ΔE 0.050
- Light Navy Blue #2E5A88 ΔE 0.052
- Denim Blue #3B5B92 ΔE 0.052
Use #2B4B94 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.