#2A4FA4
Closest named color: Cobalt (#1E488F). oklch(45% 0.144 263.9), rgb(42, 79, 164).
Aa
White text reads best on this color (7.62:1).
About this color
#2A4FA4 is a medium-dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.144 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.041 away. White text reads best on it, at 7.62:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | vivid (0.144) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.75:1 |
| White text | 7.62:1 |
Values
| HEX | #2A4FA4 |
| RGB | rgb(42, 79, 164) |
| HSL | hsl(222, 59%, 40%) |
| OKLCH | oklch(45% 0.144 263.9) |
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 #2A4FA4 | 7.62:1 | AAA | Lc -90.9 | Preferred for body text |
| Black text on #2A4FA4 | 2.75:1 | Fails | Lc 17.9 | Dividers and decoration only |
| #2A4FA4 text on white | 7.62:1 | AAA | Lc 86.1 | Fine for body text |
| #2A4FA4 text on black | 2.75:1 | Fails | Lc -16.0 | Dividers and decoration only |
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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CADAF9
oklch(88.6% 0.046 263.7)
-
Step 300
300
#A5C1F8
oklch(81% 0.084 263.6)
-
Step 400
400
#759EF4
oklch(70.6% 0.134 263.9)
-
Step 500
500
#5283F0
oklch(63% 0.172 263.9)
-
Step 600
600
#386ADF
oklch(55.7% 0.187 263.9)
-
Step 700
700
#2B57C2
oklch(49.1% 0.175 264.1)
-
Step 800
800 (this color)
#2A4FA4
oklch(45% 0.144 263.9)
-
Step 900
900
#213D7C
oklch(37.6% 0.112 263.8)
-
Step 950
950
#142449
oklch(26.9% 0.072 264.5)
#2A4FA4 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) | #1959A7 | 0.027 |
| Deuteranopia (no green cones) | #004EA2 | 0.025 |
| Tritanopia (no blue cones) | #006372 | 0.113 |
| Achromatopsia (no color) | #545454 | 0.144 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A4FA4
#2A4FA4
oklch(45% 0.144 263.9)
- #6D5000
#6D5000
oklch(45% 0.092 84.4)
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 #2A4FA4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.041
- Dusk Blue #26538D ΔE 0.041
- Blueberry #464196 ΔE 0.049
- Denim Blue #3B5B92 ΔE 0.053
- Light Navy #155084 ΔE 0.057
- Light Navy Blue #2E5A88 ΔE 0.060
- Sapphire #2138AB ΔE 0.060
- Twilight #4E518B ΔE 0.061
Use #2A4FA4 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.