#1D4197
Closest named color: Cobalt (#1E488F). oklch(40.5% 0.147 263.8), rgb(29, 65, 151).
Aa
White text reads best on this color (9.31:1).
About this color
#1D4197 is a dark, vivid blue. In OKLCH its lightness is 40%, its chroma 0.147 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.024 away. White text reads best on it, at 9.31:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | vivid (0.147) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.25:1 |
| White text | 9.31:1 |
Values
| HEX | #1D4197 |
| RGB | rgb(29, 65, 151) |
| HSL | hsl(222, 68%, 35%) |
| OKLCH | oklch(40.5% 0.147 263.8) |
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 #1D4197 | 9.31:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #1D4197 | 2.25:1 | Fails | Lc 13.0 | Not readable |
| #1D4197 text on white | 9.31:1 | AAA | Lc 91.0 | Preferred for body text |
| #1D4197 text on black | 2.25:1 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C9DAFA
oklch(88.6% 0.048 263.1)
-
Step 300
300
#A4C1F9
oklch(81% 0.086 263.3)
-
Step 400
400
#749EF6
oklch(70.7% 0.137 263.9)
-
Step 500
500
#5183F3
oklch(63.2% 0.176 264)
-
Step 600
600
#3669E1
oklch(55.5% 0.191 263.9)
-
Step 700
700
#2957C4
oklch(49.2% 0.178 263.8)
-
Step 800
800 (this color)
#1D4197
oklch(40.5% 0.147 263.8)
-
Step 900
900
#213D7E
oklch(37.7% 0.115 264.1)
-
Step 950
950
#13244A
oklch(26.9% 0.074 264)
#1D4197 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) | #004D9A | 0.032 |
| Deuteranopia (no green cones) | #004195 | 0.016 |
| Tritanopia (no blue cones) | #005665 | 0.114 |
| Achromatopsia (no color) | #474747 | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D4197
#1D4197
oklch(40.5% 0.147 263.8)
- #5E4400
#5E4400
oklch(40.4% 0.083 83.7)
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 #1D4197, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.024
- Sapphire #2138AB ΔE 0.039
- Blueberry #464196 ΔE 0.051
- Twilight Blue #0A437A ΔE 0.052
- Light Navy #155084 ΔE 0.055
- Dusk Blue #26538D ΔE 0.057
- Dark Slate Blue #483D8B ΔE 0.058
- Deep Sea Blue #015482 ΔE 0.068
Use #1D4197 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.