#1D4477
Closest named color: Twilight Blue (#0A437A). oklch(38.7% 0.098 256.2), rgb(29, 68, 119).
Aa
White text reads best on this color (9.78:1).
About this color
#1D4477 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.098 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.014 away. White text reads best on it, at 9.78:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.14:1 |
| White text | 9.78:1 |
Values
| HEX | #1D4477 |
| RGB | rgb(29, 68, 119) |
| HSL | hsl(214, 61%, 29%) |
| OKLCH | oklch(38.7% 0.098 256.2) |
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 #1D4477 | 9.78:1 | AAA | Lc -96.6 | Preferred for body text |
| Black text on #1D4477 | 2.14:1 | Fails | Lc 11.5 | Not readable |
| #1D4477 text on white | 9.78:1 | AAA | Lc 92.4 | Preferred for body text |
| #1D4477 text on black | 2.14:1 | Fails | Lc -10.0 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C8DBF4
oklch(88.5% 0.04 255.3)
-
Step 300
300
#A2C3F0
oklch(80.9% 0.073 256.2)
-
Step 400
400
#6FA3E9
oklch(70.8% 0.117 256.1)
-
Step 500
500
#478AE2
oklch(63.2% 0.15 256.1)
-
Step 600
600
#2672D0
oklch(55.7% 0.163 256.1)
-
Step 700
700
#185FB4
oklch(49.2% 0.151 256.1)
-
Step 800
800
#174E92
oklch(42.8% 0.126 256.1)
-
Step 900
900 (this color)
#1D4477
oklch(38.7% 0.098 256.2)
-
Step 950
950
#102744
oklch(27.1% 0.062 255.3)
#1D4477 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) | #2C4879 | 0.021 |
| Deuteranopia (no green cones) | #1D4076 | 0.012 |
| Tritanopia (no blue cones) | #005057 | 0.077 |
| Achromatopsia (no color) | #444444 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D4477
#1D4477
oklch(38.7% 0.098 256.2)
- #5C3D00
#5C3D00
oklch(38.6% 0.081 76.6)
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 #1D4477, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.014
- Light Navy #155084 ΔE 0.038
- Cobalt #1E488F ΔE 0.041
- Deep Sea Blue #015482 ΔE 0.048
- Marine Blue #01386A ΔE 0.048
- Dark Grey Blue #29465B ΔE 0.051
- Dusk Blue #26538D ΔE 0.056
- Charcoal #264653 ΔE 0.065
Use #1D4477 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.