#1F498C
Closest named color: Cobalt (#1E488F). oklch(41.4% 0.121 259.5), rgb(31, 73, 140).
Aa
White text reads best on this color (8.78:1).
About this color
#1F498C is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.121 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.006 away. White text reads best on it, at 8.78:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.38:1 |
| White text | 8.78:1 |
Values
| HEX | #1F498C |
| RGB | rgb(31, 73, 140) |
| HSL | hsl(217, 64%, 34%) |
| OKLCH | oklch(41.4% 0.121 259.5) |
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 #1F498C | 8.78:1 | AAA | Lc -94.2 | Preferred for body text |
| Black text on #1F498C | 2.38:1 | Fails | Lc 14.3 | Not readable |
| #1F498C text on white | 8.78:1 | AAA | Lc 89.7 | Fine for body text |
| #1F498C text on black | 2.38:1 | Fails | Lc -12.5 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF8
oklch(93.5% 0.021 261.8)
-
Step 200
200
#CADAF4
oklch(88.4% 0.04 260.1)
-
Step 300
300
#A6C2EF
oklch(80.9% 0.071 259.8)
-
Step 400
400
#76A1E7
oklch(70.7% 0.113 259.8)
-
Step 500
500
#5288E0
oklch(63.1% 0.145 259.7)
-
Step 600
600
#3670CD
oklch(55.6% 0.156 259.5)
-
Step 700
700
#285DB2
oklch(49% 0.147 259.6)
-
Step 800
800 (this color)
#1F498C
oklch(41.4% 0.121 259.5)
-
Step 900
900
#214073
oklch(37.6% 0.095 259.8)
-
Step 950
950
#142643
oklch(27% 0.059 259.5)
#1F498C 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) | #25508F | 0.022 |
| Deuteranopia (no green cones) | #09468B | 0.017 |
| Tritanopia (no blue cones) | #005963 | 0.095 |
| Achromatopsia (no color) | #4B4B4B | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F498C
#1F498C
oklch(41.4% 0.121 259.5)
- #644500
#644500
oklch(41.4% 0.086 79.4)
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 #1F498C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.006
- Light Navy #155084 ΔE 0.026
- Dusk Blue #26538D ΔE 0.031
- Twilight Blue #0A437A ΔE 0.038
- Deep Sea Blue #015482 ΔE 0.040
- Blueberry #464196 ΔE 0.053
- Light Navy Blue #2E5A88 ΔE 0.056
- Dark Slate Blue #483D8B ΔE 0.057
Use #1F498C 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.