#1E4589
Closest named color: Cobalt (#1E488F). oklch(40.3% 0.122 260.6), rgb(30, 69, 137).
Aa
White text reads best on this color (9.26:1).
About this color
#1E4589 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.122 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.012 away. White text reads best on it, at 9.26:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.26:1 |
| White text | 9.26:1 |
Values
| HEX | #1E4589 |
| RGB | rgb(30, 69, 137) |
| HSL | hsl(218, 64%, 33%) |
| OKLCH | oklch(40.3% 0.122 260.6) |
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 #1E4589 | 9.26:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #1E4589 | 2.26:1 | Fails | Lc 13.0 | Not readable |
| #1E4589 text on white | 9.26:1 | AAA | Lc 91.0 | Preferred for body text |
| #1E4589 text on black | 2.26:1 | Fails | Lc -11.4 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF8
oklch(93.5% 0.021 261.8)
-
Step 200
200
#CADAF4
oklch(88.4% 0.04 260.1)
-
Step 300
300
#A7C2EF
oklch(81% 0.07 260.6)
-
Step 400
400
#77A1E8
oklch(70.8% 0.114 260.5)
-
Step 500
500
#5487E1
oklch(63% 0.147 261)
-
Step 600
600
#396FCE
oklch(55.5% 0.158 260.8)
-
Step 700
700
#2B5DB3
oklch(49.2% 0.147 260.5)
-
Step 800
800 (this color)
#1E4589
oklch(40.3% 0.122 260.6)
-
Step 900
900
#224073
oklch(37.7% 0.095 260.3)
-
Step 950
950
#152644
oklch(27.1% 0.061 261)
#1E4589 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) | #1F4C8C | 0.020 |
| Deuteranopia (no green cones) | #004388 | 0.019 |
| Tritanopia (no blue cones) | #005560 | 0.095 |
| Achromatopsia (no color) | #474747 | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1E4589
#1E4589
oklch(40.3% 0.122 260.6)
- #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 #1E4589, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.012
- Twilight Blue #0A437A ΔE 0.030
- Light Navy #155084 ΔE 0.034
- Dusk Blue #26538D ΔE 0.042
- Deep Sea Blue #015482 ΔE 0.048
- Blueberry #464196 ΔE 0.055
- Dark Slate Blue #483D8B ΔE 0.056
- Sapphire #2138AB ΔE 0.065
Use #1E4589 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.