#1A4588
Closest named color: Cobalt (#1E488F). oklch(40% 0.122 259.2), rgb(26, 69, 136).
Aa
White text reads best on this color (9.33:1).
About this color
#1A4588 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.122 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.015 away. White text reads best on it, at 9.33:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.25:1 |
| White text | 9.33:1 |
Values
| HEX | #1A4588 |
| RGB | rgb(26, 69, 136) |
| HSL | hsl(217, 68%, 32%) |
| OKLCH | oklch(40% 0.122 259.2) |
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 #1A4588 | 9.33:1 | AAA | Lc -95.5 | Preferred for body text |
| Black text on #1A4588 | 2.25:1 | Fails | Lc 12.8 | Not readable |
| #1A4588 text on white | 9.33:1 | AAA | Lc 91.1 | Preferred for body text |
| #1A4588 text on black | 2.25:1 | Fails | Lc -11.2 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFC
oklch(93.7% 0.026 259)
-
Step 200
200
#C6DBFB
oklch(88.6% 0.05 258.7)
-
Step 300
300
#9DC2FC
oklch(80.8% 0.092 259.2)
-
Step 400
400
#67A0FB
oklch(70.7% 0.147 259.4)
-
Step 500
500
#3C85F8
oklch(63.1% 0.187 259.3)
-
Step 600
600
#156BE7
oklch(55.6% 0.203 259.2)
-
Step 700
700
#0558C9
oklch(49% 0.19 259.4)
-
Step 800
800
#0B49A2
oklch(42.7% 0.156 259.2)
-
Step 900
900 (this color)
#1A4588
oklch(40% 0.122 259.2)
-
Step 950
950
#0D254B
oklch(27% 0.077 259.3)
#1A4588 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) | #1F4C8A | 0.021 |
| Deuteranopia (no green cones) | #004287 | 0.018 |
| Tritanopia (no blue cones) | #005560 | 0.094 |
| Achromatopsia (no color) | #474747 | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1A4588
#1A4588
oklch(40% 0.122 259.2)
- #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 #1A4588, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.015
- Twilight Blue #0A437A ΔE 0.027
- Light Navy #155084 ΔE 0.034
- Dusk Blue #26538D ΔE 0.044
- Deep Sea Blue #015482 ΔE 0.047
- Blueberry #464196 ΔE 0.059
- Dark Slate Blue #483D8B ΔE 0.059
- Marine Blue #01386A ΔE 0.066
Use #1A4588 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.