#1F4B7D
Closest named color: Light Navy (#155084). oklch(40.9% 0.097 253.7), rgb(31, 75, 125).
Aa
White text reads best on this color (8.89:1).
About this color
#1F4B7D is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.097 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.017 away. White text reads best on it, at 8.89:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.36:1 |
| White text | 8.89:1 |
Values
| HEX | #1F4B7D |
| RGB | rgb(31, 75, 125) |
| HSL | hsl(212, 60%, 31%) |
| OKLCH | oklch(40.9% 0.097 253.7) |
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 #1F4B7D | 8.89:1 | AAA | Lc -94.6 | Preferred for body text |
| Black text on #1F4B7D | 2.36:1 | Fails | Lc 13.9 | Not readable |
| #1F4B7D text on white | 8.89:1 | AAA | Lc 90.1 | Preferred for body text |
| #1F4B7D text on black | 2.36:1 | Fails | Lc -12.2 | 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
#CBDBEE
oklch(88.5% 0.031 252.7)
-
Step 300
300
#A8C3E5
oklch(80.9% 0.057 254.3)
-
Step 400
400
#78A4D8
oklch(70.7% 0.09 253.1)
-
Step 500
500
#558CCE
oklch(63.1% 0.116 253.9)
-
Step 600
600
#3875BB
oklch(55.6% 0.126 253.7)
-
Step 700
700
#2A62A1
oklch(49.1% 0.117 253.5)
-
Step 800
800 (this color)
#1F4B7D
oklch(40.9% 0.097 253.7)
-
Step 900
900
#234369
oklch(37.8% 0.076 253.9)
-
Step 950
950
#15273D
oklch(26.9% 0.048 254.2)
#1F4B7D 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) | #344F7F | 0.027 |
| Deuteranopia (no green cones) | #25467C | 0.015 |
| Tritanopia (no blue cones) | #00575E | 0.075 |
| Achromatopsia (no color) | #4A4A4A | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F4B7D
#1F4B7D
oklch(40.9% 0.097 253.7)
- #664100
#664100
oklch(40.8% 0.087 72.9)
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 #1F4B7D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.017
- Deep Sea Blue #015482 ΔE 0.028
- Twilight Blue #0A437A ΔE 0.030
- Cobalt #1E488F ΔE 0.033
- Dusk Blue #26538D ΔE 0.035
- Light Navy Blue #2E5A88 ΔE 0.050
- Dark Grey Blue #29465B ΔE 0.057
- YInMn Blue #415A77 ΔE 0.065
Use #1F4B7D 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.