#1C39BF
Closest named color: Blue Blue (#2242C7). oklch(42.7% 0.21 266.5), rgb(28, 57, 191).
Aa
White text reads best on this color (8.79:1).
About this color
#1C39BF is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.210 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.025 away. White text reads best on it, at 8.79:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.210) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 2.38:1 |
| White text | 8.79:1 |
Values
| HEX | #1C39BF |
| RGB | rgb(28, 57, 191) |
| HSL | hsl(229, 74%, 43%) |
| OKLCH | oklch(42.7% 0.21 266.5) |
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 #1C39BF | 8.79:1 | AAA | Lc -93.6 | Preferred for body text |
| Black text on #1C39BF | 2.38:1 | Fails | Lc 14.9 | Not readable |
| #1C39BF text on white | 8.79:1 | AAA | Lc 89.1 | Fine for body text |
| #1C39BF text on black | 2.38:1 | Fails | Lc -13.1 | 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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C8D9FF
oklch(88.5% 0.056 266.2)
-
Step 300
300
#A4BFFF
oklch(80.8% 0.096 266.6)
-
Step 400
400
#759CFF
oklch(70.8% 0.151 266.4)
-
Step 500
500
#527EFF
oklch(63% 0.198 266.5)
-
Step 600
600
#325DFF
oklch(55.6% 0.244 266.4)
-
Step 700
700
#2243ED
oklch(49.2% 0.253 266.4)
-
Step 800
800 (this color)
#1C39BF
oklch(42.7% 0.21 266.5)
-
Step 900
900
#1A3496
oklch(37.6% 0.163 266.5)
-
Step 950
950
#0F2058
oklch(27% 0.104 266.4)
#1C39BF 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) | #0052C3 | 0.055 |
| Deuteranopia (no green cones) | #0043BD | 0.022 |
| Tritanopia (no blue cones) | #005F78 | 0.160 |
| Achromatopsia (no color) | #4A4A4A | 0.210 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1C39BF
#1C39BF
oklch(42.7% 0.21 266.5)
- #644B00
#644B00
oklch(42.8% 0.087 86.6)
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 #1C39BF, closest first.
No curated palette has a color within ΔE 0.04 of #1C39BF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.025
- Sapphire #2138AB ΔE 0.033
- Majorelle Blue #3F37C9 ΔE 0.043
- Indigo Blue #3A18B1 ΔE 0.063
- True Blue #010FCC ΔE 0.064
- Ultramarine Blue #1805DB ΔE 0.067
- Medium Blue #0000CD ΔE 0.072
- Blue With A Hint Of Purple #533CC6 ΔE 0.074
Use #1C39BF 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.