#2A4774
Closest named color: Twilight Blue (#0A437A). oklch(39.8% 0.084 258.9), rgb(42, 71, 116).
Aa
White text reads best on this color (9.32:1).
About this color
#2A4774 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.084 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.032 away. White text reads best on it, at 9.32:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.25:1 |
| White text | 9.32:1 |
Values
| HEX | #2A4774 |
| RGB | rgb(42, 71, 116) |
| HSL | hsl(216, 47%, 31%) |
| OKLCH | oklch(39.8% 0.084 258.9) |
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 #2A4774 | 9.32:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #2A4774 | 2.25:1 | Fails | Lc 12.6 | Not readable |
| #2A4774 text on white | 9.32:1 | AAA | Lc 91.4 | Preferred for body text |
| #2A4774 text on black | 2.25:1 | Fails | Lc -11.0 | 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 900.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E3EAF6
oklch(93.5% 0.018 261.3)
-
Step 200
200
#CBDAF1
oklch(88.4% 0.036 258.9)
-
Step 300
300
#A8C2EA
oklch(80.8% 0.064 258.9)
-
Step 400
400
#7AA2DF
oklch(70.7% 0.1 258.6)
-
Step 500
500
#5789D7
oklch(63% 0.13 259)
-
Step 600
600
#3C72C4
oklch(55.6% 0.14 258.6)
-
Step 700
700
#2F5FA9
oklch(49.1% 0.13 258.9)
-
Step 800
800
#274E89
oklch(42.7% 0.108 258.5)
-
Step 900
900 (this color)
#2A4774
oklch(39.8% 0.084 258.9)
-
Step 950
950
#162640
oklch(26.9% 0.053 259.7)
#2A4774 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) | #344B76 | 0.018 |
| Deuteranopia (no green cones) | #2A4473 | 0.009 |
| Tritanopia (no blue cones) | #005158 | 0.071 |
| Achromatopsia (no color) | #474747 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A4774
#2A4774
oklch(39.8% 0.084 258.9)
- #5F4100
#5F4100
oklch(39.9% 0.083 79)
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 #2A4774, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.032
- Light Navy #155084 ΔE 0.035
- Dark Grey Blue #29465B ΔE 0.043
- Deep Sea Blue #015482 ΔE 0.044
- Cobalt #1E488F ΔE 0.046
- Dusk Blue #26538D ΔE 0.049
- Charcoal #264653 ΔE 0.058
- Light Navy Blue #2E5A88 ΔE 0.062
Use #2A4774 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.