#2B3F96
Closest named color: Cobalt (#1E488F). oklch(40.6% 0.144 269.2), rgb(43, 63, 150).
Aa
White text reads best on this color (9.31:1).
About this color
#2B3F96 is a dark, vivid blue. In OKLCH its lightness is 41%, its chroma 0.144 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.029 away. White text reads best on it, at 9.31:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | vivid (0.144) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.25:1 |
| White text | 9.31:1 |
Values
| HEX | #2B3F96 |
| RGB | rgb(43, 63, 150) |
| HSL | hsl(229, 55%, 38%) |
| OKLCH | oklch(40.6% 0.144 269.2) |
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 #2B3F96 | 9.31:1 | AAA | Lc -95.4 | Preferred for body text |
| Black text on #2B3F96 | 2.25:1 | Fails | Lc 12.9 | Not readable |
| #2B3F96 text on white | 9.31:1 | AAA | Lc 91.1 | Preferred for body text |
| #2B3F96 text on black | 2.25:1 | Fails | Lc -11.3 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CCD9F9
oklch(88.6% 0.046 267.9)
-
Step 300
300
#AABFF8
oklch(80.9% 0.084 268.8)
-
Step 400
400
#7E9BF5
oklch(70.6% 0.136 269.2)
-
Step 500
500
#6080F1
oklch(63.2% 0.173 269.1)
-
Step 600
600
#4866DF
oklch(55.6% 0.187 269)
-
Step 700
700
#3A54C2
oklch(49.2% 0.174 269)
-
Step 800
800 (this color)
#2B3F96
oklch(40.6% 0.144 269.2)
-
Step 900
900
#2A3B7D
oklch(37.7% 0.114 269.4)
-
Step 950
950
#182349
oklch(26.9% 0.072 269)
#2B3F96 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) | #004C99 | 0.039 |
| Deuteranopia (no green cones) | #004294 | 0.030 |
| Tritanopia (no blue cones) | #005464 | 0.116 |
| Achromatopsia (no color) | #474747 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B3F96
#2B3F96
oklch(40.6% 0.144 269.2)
- #5B4600
#5B4600
oklch(40.5% 0.083 89.1)
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 #2B3F96, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.029
- Blueberry #464196 ΔE 0.039
- Sapphire #2138AB ΔE 0.040
- Dark Slate Blue #483D8B ΔE 0.045
- Twilight Blue #0A437A ΔE 0.057
- Dusk Blue #26538D ΔE 0.058
- Light Navy #155084 ΔE 0.060
- Deep Sea Blue #015482 ΔE 0.073
Use #2B3F96 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.