#1F74CA
Closest named color: Windows Blue (#3778BF). oklch(55.6% 0.154 253), rgb(31, 116, 202).
Aa
White text reads best on this color (4.76:1).
About this color
#1F74CA is a medium-dark, vivid blue. In OKLCH its lightness is 56%, its chroma 0.154 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.027 away. White text reads best on it, at 4.76:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.40:1 |
| White text | 4.76:1 |
Values
| HEX | #1F74CA |
| RGB | rgb(31, 116, 202) |
| HSL | hsl(210, 73%, 46%) |
| OKLCH | oklch(55.6% 0.154 253) |
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 #1F74CA | 4.76:1 | AA | Lc -78.0 | Fine for body text |
| Black text on #1F74CA | 4.40:1 | AA large text | Lc 31.5 | Non-text elements, placeholder text |
| #1F74CA text on white | 4.76:1 | AA | Lc 72.5 | Content text, not long reading |
| #1F74CA text on black | 4.40:1 | AA large text | Lc -29.1 | Dividers and decoration only |
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 600.
-
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
#C8DBF3
oklch(88.5% 0.039 254.3)
-
Step 300
300
#A1C4ED
oklch(80.9% 0.069 252.7)
-
Step 400
400
#6DA4E4
oklch(70.7% 0.111 253)
-
Step 500
500
#438CDC
oklch(63.1% 0.141 252.8)
-
Step 600
600 (this color)
#1F74CA
oklch(55.6% 0.154 253)
-
Step 700
700
#0F61AF
oklch(49.1% 0.144 253)
-
Step 800
800
#124F8D
oklch(42.6% 0.119 253.1)
-
Step 900
900
#184371
oklch(37.8% 0.092 252.8)
-
Step 950
950
#0F2742
oklch(26.9% 0.059 253.1)
#1F74CA 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) | #487BCD | 0.039 |
| Deuteranopia (no green cones) | #276CC8 | 0.021 |
| Tritanopia (no blue cones) | #008995 | 0.115 |
| Achromatopsia (no color) | #737373 | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F74CA
#1F74CA
oklch(55.6% 0.154 253)
- #9C6600
#9C6600
oklch(55.5% 0.118 73)
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 #1F74CA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.027
- Mid Blue #276AB3 ΔE 0.041
- Nice Blue #107AB0 ΔE 0.048
- French Blue #436BAD ΔE 0.051
- Water Blue #0E87CC ΔE 0.052
- Royal Blue #4169E1 ΔE 0.052
- Flat Blue #3C73A8 ΔE 0.055
- Cerulean Blue #056EEE ΔE 0.059
Use #1F74CA 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.