#1F5ECC
Closest named color: Warm Blue (#4B57DB). oklch(51% 0.183 260.8), rgb(31, 94, 204).
Aa
White text reads best on this color (5.94:1).
About this color
#1F5ECC is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.183 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.048 away. White text reads best on it, at 5.94:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.183) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.53:1 |
| White text | 5.94:1 |
Values
| HEX | #1F5ECC |
| RGB | rgb(31, 94, 204) |
| HSL | hsl(218, 74%, 46%) |
| OKLCH | oklch(51% 0.183 260.8) |
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 #1F5ECC | 5.94:1 | AA | Lc -84.3 | Fine for body text |
| Black text on #1F5ECC | 3.53:1 | AA large text | Lc 25.0 | Dividers and decoration only |
| #1F5ECC text on white | 5.94:1 | AA | Lc 79.1 | Fine for body text |
| #1F5ECC text on black | 3.53:1 | AA large text | Lc -22.7 | 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
#E0EBFC
oklch(93.7% 0.026 259)
-
Step 200
200
#C7DAFA
oklch(88.4% 0.049 260.9)
-
Step 300
300
#A0C2FA
oklch(80.9% 0.088 260.2)
-
Step 400
400
#6DA0F8
oklch(70.8% 0.141 260.7)
-
Step 500
500
#4585F5
oklch(63.2% 0.18 260.7)
-
Step 600
600
#266BE4
oklch(55.7% 0.197 260.8)
-
Step 700
700 (this color)
#1F5ECC
oklch(51% 0.183 260.8)
-
Step 800
800
#1749A0
oklch(42.7% 0.151 260.8)
-
Step 900
900
#193E7F
oklch(37.7% 0.118 260.7)
-
Step 950
950
#10254A
oklch(27% 0.074 260.8)
#1F5ECC 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) | #006CD0 | 0.035 |
| Deuteranopia (no green cones) | #005CCA | 0.014 |
| Tritanopia (no blue cones) | #00798C | 0.139 |
| Achromatopsia (no color) | #646464 | 0.183 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1F5ECC
#1F5ECC
oklch(51% 0.183 260.8)
- #855E00
#855E00
oklch(51% 0.105 80.3)
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 #1F5ECC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.048
- Azul #1D5DEC ΔE 0.049
- Royal Blue #4169E1 ΔE 0.054
- Mid Blue #276AB3 ΔE 0.054
- Neon Blue #4361EE ΔE 0.063
- Cerulean Blue #056EEE ΔE 0.063
- Blue Blue #2242C7 ΔE 0.066
- French Blue #436BAD ΔE 0.072
Use #1F5ECC 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.