#1F7CDB
Closest named color: Water Blue (#0E87CC). oklch(58.5% 0.167 253.5), rgb(31, 124, 219).
Aa
Black text reads best on this color (4.96:1).
About this color
#1F7CDB is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.167 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.041 away. Black text reads best on it, at 4.96:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.167) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 4.96:1 |
| White text | 4.23:1 |
Values
| HEX | #1F7CDB |
| RGB | rgb(31, 124, 219) |
| HSL | hsl(210, 75%, 49%) |
| OKLCH | oklch(58.5% 0.167 253.5) |
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 #1F7CDB | 4.23:1 | AA large text | Lc -74.1 | Content text, not long reading |
| Black text on #1F7CDB | 4.96:1 | AA | Lc 35.4 | Non-text elements, placeholder text |
| #1F7CDB text on white | 4.23:1 | AA large text | Lc 68.7 | Content text, not long reading |
| #1F7CDB text on black | 4.96:1 | AA | Lc -33.0 | Non-text elements, placeholder text |
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
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C6DBF5
oklch(88.4% 0.042 253.8)
-
Step 300
300
#9FC4F1
oklch(80.9% 0.075 253.6)
-
Step 400
400
#69A4EA
oklch(70.8% 0.12 253.6)
-
Step 500
500
#3C8BE3
oklch(63.1% 0.154 253.5)
-
Step 600
600 (this color)
#1F7CDB
oklch(58.5% 0.167 253.5)
-
Step 700
700
#0060B4
oklch(49.1% 0.153 253.4)
-
Step 800
800
#074F93
oklch(42.8% 0.129 253.4)
-
Step 900
900
#134275
oklch(37.7% 0.1 253.6)
-
Step 950
950
#0D2744
oklch(27% 0.063 253.3)
#1F7CDB 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) | #4A84DF | 0.040 |
| Deuteranopia (no green cones) | #2373D9 | 0.024 |
| Tritanopia (no blue cones) | #0093A1 | 0.124 |
| Achromatopsia (no color) | #7B7B7B | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F7CDB
#1F7CDB
oklch(58.5% 0.167 253.5)
- #A76E00
#A76E00
oklch(58.4% 0.124 73.4)
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 #1F7CDB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.041
- Windows Blue #3778BF ΔE 0.043
- Cerulean Blue #056EEE ΔE 0.050
- Royal Blue #4169E1 ΔE 0.052
- Clear Blue #247AFD ΔE 0.053
- Dark Sky Blue #448EE4 ΔE 0.058
- Nice Blue #107AB0 ΔE 0.068
- Cool Blue #4984B8 ΔE 0.068
Use #1F7CDB 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.