#2B3F94
Closest named color: Cobalt (#1E488F). oklch(40.4% 0.142 269.1), rgb(43, 63, 148).
Aa
White text reads best on this color (9.36:1).
About this color
#2B3F94 is a dark, vivid blue. In OKLCH its lightness is 40%, its chroma 0.142 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.027 away. White text reads best on it, at 9.36:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.24:1 |
| White text | 9.36:1 |
Values
| HEX | #2B3F94 |
| RGB | rgb(43, 63, 148) |
| HSL | hsl(229, 55%, 37%) |
| OKLCH | oklch(40.4% 0.142 269.1) |
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 #2B3F94 | 9.36:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #2B3F94 | 2.24:1 | Fails | Lc 12.7 | Not readable |
| #2B3F94 text on white | 9.36:1 | AAA | Lc 91.2 | Preferred for body text |
| #2B3F94 text on black | 2.24:1 | Fails | Lc -11.1 | 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 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
#CDD9F9
oklch(88.6% 0.046 269.2)
-
Step 300
300
#ABBFF7
oklch(80.9% 0.083 269.3)
-
Step 400
400
#7F9CF3
oklch(70.8% 0.132 268.9)
-
Step 500
500
#6080EF
oklch(63.1% 0.17 269)
-
Step 600
600
#4966DD
oklch(55.5% 0.184 269.2)
-
Step 700
700
#3B54C0
oklch(49% 0.171 269.2)
-
Step 800
800 (this color)
#2B3F94
oklch(40.4% 0.142 269.1)
-
Step 900
900
#2A3C7B
oklch(37.7% 0.109 268.7)
-
Step 950
950
#192348
oklch(26.9% 0.07 269.8)
#2B3F94 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) | #004B97 | 0.037 |
| Deuteranopia (no green cones) | #004292 | 0.030 |
| Tritanopia (no blue cones) | #005463 | 0.115 |
| Achromatopsia (no color) | #464646 | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B3F94
#2B3F94
oklch(40.4% 0.142 269.1)
- #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 #2B3F94, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.027
- Blueberry #464196 ΔE 0.039
- Sapphire #2138AB ΔE 0.043
- Dark Slate Blue #483D8B ΔE 0.044
- Twilight Blue #0A437A ΔE 0.054
- Dusk Blue #26538D ΔE 0.058
- Light Navy #155084 ΔE 0.058
- Deep Sea Blue #015482 ΔE 0.072
Use #2B3F94 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.