#1A4371
Closest named color: Twilight Blue (#0A437A). oklch(37.9% 0.091 253.5), rgb(26, 67, 113).
Aa
White text reads best on this color (10.07:1).
About this color
#1A4371 is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.091 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.017 away. White text reads best on it, at 10.07:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.08:1 |
| White text | 10.07:1 |
Values
| HEX | #1A4371 |
| RGB | rgb(26, 67, 113) |
| HSL | hsl(212, 63%, 27%) |
| OKLCH | oklch(37.9% 0.091 253.5) |
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 #1A4371 | 10.07:1 | AAA | Lc -97.2 | Preferred for body text |
| Black text on #1A4371 | 2.08:1 | Fails | Lc 10.8 | Not readable |
| #1A4371 text on white | 10.07:1 | AAA | Lc 93.1 | Preferred for body text |
| #1A4371 text on black | 2.08:1 | Fails | Lc -9.4 | 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 900.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C8DBF2
oklch(88.4% 0.038 253.2)
-
Step 300
300
#A2C4EC
oklch(80.9% 0.068 252.7)
-
Step 400
400
#6FA4E3
oklch(70.7% 0.109 253.5)
-
Step 500
500
#468CDB
oklch(63.2% 0.139 253.2)
-
Step 600
600
#2474C9
oklch(55.6% 0.152 253.5)
-
Step 700
700
#1561AE
oklch(49.2% 0.141 253.5)
-
Step 800
800
#154F8D
oklch(42.6% 0.118 253.7)
-
Step 900
900 (this color)
#1A4371
oklch(37.9% 0.091 253.5)
-
Step 950
950
#102742
oklch(27% 0.058 253.9)
#1A4371 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) | #2E4673 | 0.024 |
| Deuteranopia (no green cones) | #203E70 | 0.015 |
| Tritanopia (no blue cones) | #004E54 | 0.070 |
| Achromatopsia (no color) | #424242 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1A4371
#1A4371
oklch(37.9% 0.091 253.5)
- #5B3A00
#5B3A00
oklch(37.8% 0.08 73.5)
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 #1A4371, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.017
- Marine Blue #01386A ΔE 0.041
- Dark Grey Blue #29465B ΔE 0.043
- Light Navy #155084 ΔE 0.046
- Cobalt #1E488F ΔE 0.051
- Deep Sea Blue #015482 ΔE 0.053
- Charcoal #264653 ΔE 0.056
- Prussian Blue #1D3557 ΔE 0.057
Use #1A4371 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.