#1A4FAC
Closest named color: Cobalt (#1E488F). oklch(45.1% 0.159 260.8), rgb(26, 79, 172).
Aa
White text reads best on this color (7.61:1).
About this color
#1A4FAC is a medium-dark, vivid blue. In OKLCH its lightness is 45%, its chroma 0.159 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.049 away. White text reads best on it, at 7.61:1.
| Hue family | Blues |
| Lightness | medium-dark (45%) |
| Chroma | vivid (0.159) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.75:1 |
| White text | 7.61:1 |
Values
| HEX | #1A4FAC |
| RGB | rgb(26, 79, 172) |
| HSL | hsl(218, 74%, 39%) |
| OKLCH | oklch(45.1% 0.159 260.8) |
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 #1A4FAC | 7.61:1 | AAA | Lc -90.7 | Preferred for body text |
| Black text on #1A4FAC | 2.75:1 | Fails | Lc 18.1 | Dividers and decoration only |
| #1A4FAC text on white | 7.61:1 | AAA | Lc 85.9 | Fine for body text |
| #1A4FAC text on black | 2.75:1 | Fails | Lc -16.2 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFC
oklch(93.7% 0.026 259)
-
Step 200
200
#C6DAFC
oklch(88.4% 0.052 261.1)
-
Step 300
300
#9EC2FD
oklch(80.9% 0.093 260.1)
-
Step 400
400
#699FFD
oklch(70.7% 0.15 260.8)
-
Step 500
500
#4084FA
oklch(63.2% 0.189 260.6)
-
Step 600
600
#1F69E9
oklch(55.5% 0.207 260.8)
-
Step 700
700
#1257CB
oklch(49.2% 0.192 260.8)
-
Step 800
800 (this color)
#1A4FAC
oklch(45.1% 0.159 260.8)
-
Step 900
900
#163D82
oklch(37.6% 0.125 260.9)
-
Step 950
950
#0E254C
oklch(27.1% 0.078 260.3)
#1A4FAC 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) | #005BAF | 0.031 |
| Deuteranopia (no green cones) | #004DAA | 0.014 |
| Tritanopia (no blue cones) | #006675 | 0.123 |
| Achromatopsia (no color) | #545454 | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1A4FAC
#1A4FAC
oklch(45.1% 0.159 260.8)
- #704F00
#704F00
oklch(45.2% 0.093 80.8)
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 #1A4FAC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.049
- Blue Blue #2242C7 ΔE 0.052
- Dusk Blue #26538D ΔE 0.054
- Sapphire #2138AB ΔE 0.055
- Blueberry #464196 ΔE 0.063
- Denim Blue #3B5B92 ΔE 0.066
- Light Navy #155084 ΔE 0.067
- Light Navy Blue #2E5A88 ΔE 0.073
Use #1A4FAC 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.