#2B4779
Closest named color: Twilight Blue (#0A437A). oklch(40.2% 0.091 261.2), rgb(43, 71, 121).
Aa
White text reads best on this color (9.21:1).
About this color
#2B4779 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.091 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.031 away. White text reads best on it, at 9.21:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.28:1 |
| White text | 9.21:1 |
Values
| HEX | #2B4779 |
| RGB | rgb(43, 71, 121) |
| HSL | hsl(218, 48%, 32%) |
| OKLCH | oklch(40.2% 0.091 261.2) |
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 #2B4779 | 9.21:1 | AAA | Lc -95.4 | Preferred for body text |
| Black text on #2B4779 | 2.28:1 | Fails | Lc 12.9 | Not readable |
| #2B4779 text on white | 9.21:1 | AAA | Lc 91.0 | Preferred for body text |
| #2B4779 text on black | 2.28:1 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CEDAED
oklch(88.5% 0.029 259.6)
-
Step 300
300
#AEC2E4
oklch(81% 0.053 261)
-
Step 400
400
#83A1D6
oklch(70.7% 0.085 261.5)
-
Step 500
500
#6389CB
oklch(63% 0.109 261)
-
Step 600
600
#4A72B8
oklch(55.6% 0.118 260.9)
-
Step 700
700
#3C5F9F
oklch(49.1% 0.111 261.5)
-
Step 800
800 (this color)
#2B4779
oklch(40.2% 0.091 261.2)
-
Step 900
900
#2C4167
oklch(37.7% 0.071 261.6)
-
Step 950
950
#1A263C
oklch(26.9% 0.045 261.9)
#2B4779 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) | #314B7B | 0.015 |
| Deuteranopia (no green cones) | #264478 | 0.011 |
| Tritanopia (no blue cones) | #00525A | 0.076 |
| Achromatopsia (no color) | #484848 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4779
#2B4779
oklch(40.2% 0.091 261.2)
- #5F4300
#5F4300
oklch(40.3% 0.083 81.5)
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 #2B4779, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.031
- Light Navy #155084 ΔE 0.031
- Cobalt #1E488F ΔE 0.038
- Deep Sea Blue #015482 ΔE 0.042
- Dusk Blue #26538D ΔE 0.044
- Dark Grey Blue #29465B ΔE 0.052
- Dark Slate Blue #483D8B ΔE 0.058
- Light Navy Blue #2E5A88 ΔE 0.059
Use #2B4779 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.