#1F5DCA
Closest named color: Warm Blue (#4B57DB). oklch(50.6% 0.181 260.9), rgb(31, 93, 202).
Aa
White text reads best on this color (6.03:1).
About this color
#1F5DCA is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.181 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.050 away. White text reads best on it, at 6.03:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.181) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.47:1 |
| White text | 6.03:1 |
Values
| HEX | #1F5DCA |
| RGB | rgb(31, 93, 202) |
| HSL | hsl(218, 73%, 46%) |
| OKLCH | oklch(50.6% 0.181 260.9) |
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 #1F5DCA | 6.03:1 | AA | Lc -84.8 | Fine for body text |
| Black text on #1F5DCA | 3.47:1 | AA large text | Lc 24.5 | Dividers and decoration only |
| #1F5DCA text on white | 6.03:1 | AA | Lc 79.6 | Fine for body text |
| #1F5DCA text on black | 3.47:1 | AA large text | Lc -22.3 | 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 700.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EAFB
oklch(93.5% 0.025 261.1)
-
Step 200
200
#C7DAFA
oklch(88.4% 0.049 260.9)
-
Step 300
300
#A1C2FA
oklch(81% 0.087 260.8)
-
Step 400
400
#6DA0F7
oklch(70.8% 0.139 260.5)
-
Step 500
500
#4685F4
oklch(63.2% 0.179 260.8)
-
Step 600
600
#276BE3
oklch(55.6% 0.195 260.9)
-
Step 700
700 (this color)
#1F5DCA
oklch(50.6% 0.181 260.9)
-
Step 800
800
#18499F
oklch(42.7% 0.15 260.8)
-
Step 900
900
#1A3E7E
oklch(37.6% 0.116 260.9)
-
Step 950
950
#10254A
oklch(27% 0.074 260.8)
#1F5DCA 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) | #006BCE | 0.035 |
| Deuteranopia (no green cones) | #005BC8 | 0.014 |
| Tritanopia (no blue cones) | #00788A | 0.139 |
| Achromatopsia (no color) | #636363 | 0.181 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F5DCA
#1F5DCA
oklch(50.6% 0.181 260.9)
- #835D00
#835D00
oklch(50.5% 0.104 80.8)
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 #1F5DCA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.050
- Azul #1D5DEC ΔE 0.052
- Mid Blue #276AB3 ΔE 0.054
- Royal Blue #4169E1 ΔE 0.057
- Blue Blue #2242C7 ΔE 0.063
- Neon Blue #4361EE ΔE 0.066
- Cerulean Blue #056EEE ΔE 0.067
- French Blue #436BAD ΔE 0.072
Use #1F5DCA 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.