#1F4A7E
Closest named color: Light Navy (#155084). oklch(40.7% 0.1 254.9), rgb(31, 74, 126).
Aa
White text reads best on this color (8.97:1).
About this color
#1F4A7E is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.100 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.019 away. White text reads best on it, at 8.97:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.33:1 |
| White text | 8.97:1 |
Values
| HEX | #1F4A7E |
| RGB | rgb(31, 74, 126) |
| HSL | hsl(213, 61%, 31%) |
| OKLCH | oklch(40.7% 0.1 254.9) |
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 #1F4A7E | 8.97:1 | AAA | Lc -94.7 | Preferred for body text |
| Black text on #1F4A7E | 2.33:1 | Fails | Lc 13.7 | Not readable |
| #1F4A7E text on white | 8.97:1 | AAA | Lc 90.3 | Preferred for body text |
| #1F4A7E text on black | 2.33:1 | Fails | Lc -12.0 | 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 800.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF5
oklch(93.6% 0.017 250.8)
-
Step 200
200
#CBDBEF
oklch(88.6% 0.033 254)
-
Step 300
300
#A8C3E6
oklch(80.9% 0.058 255)
-
Step 400
400
#78A3DA
oklch(70.6% 0.094 254.9)
-
Step 500
500
#558CD0
oklch(63.2% 0.119 254.6)
-
Step 600
600
#3974BD
oklch(55.5% 0.13 255.1)
-
Step 700
700
#2B61A3
oklch(49% 0.121 255.1)
-
Step 800
800 (this color)
#1F4A7E
oklch(40.7% 0.1 254.9)
-
Step 900
900
#23426A
oklch(37.6% 0.078 255.6)
-
Step 950
950
#15273E
oklch(27% 0.049 255.2)
#1F4A7E 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) | #324E80 | 0.025 |
| Deuteranopia (no green cones) | #23457D | 0.014 |
| Tritanopia (no blue cones) | #00565E | 0.076 |
| Achromatopsia (no color) | #494949 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F4A7E
#1F4A7E
oklch(40.7% 0.1 254.9)
- #644100
#644100
oklch(40.6% 0.086 74.5)
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 #1F4A7E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.019
- Twilight Blue #0A437A ΔE 0.028
- Cobalt #1E488F ΔE 0.030
- Deep Sea Blue #015482 ΔE 0.030
- Dusk Blue #26538D ΔE 0.035
- Light Navy Blue #2E5A88 ΔE 0.053
- Dark Grey Blue #29465B ΔE 0.058
- Dark Slate Blue #483D8B ΔE 0.065
Use #1F4A7E 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.