#4F89DB
Closest named color: Dark Sky Blue (#448EE4). oklch(62.9% 0.139 257.3), rgb(79, 137, 219).
Aa
Black text reads best on this color (5.93:1).
About this color
#4F89DB is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.139 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.018 away. Black text reads best on it, at 5.93:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 5.93:1 |
| White text | 3.53:1 |
Values
| HEX | #4F89DB |
| RGB | rgb(79, 137, 219) |
| HSL | hsl(215, 66%, 58%) |
| OKLCH | oklch(62.9% 0.139 257.3) |
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 #4F89DB | 3.53:1 | AA large text | Lc -68.2 | Content text, not long reading |
| Black text on #4F89DB | 5.93:1 | AA | Lc 41.3 | Non-text elements, placeholder text |
| #4F89DB text on white | 3.53:1 | AA large text | Lc 62.7 | Content text, not long reading |
| #4F89DB text on black | 5.93:1 | AA | Lc -39.0 | 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 500.
-
Step 50
50
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EBF7
oklch(93.7% 0.019 255.5)
-
Step 200
200
#CADBF2
oklch(88.6% 0.037 256)
-
Step 300
300
#A5C3ED
oklch(81% 0.068 256.8)
-
Step 400
400
#75A2E4
oklch(70.7% 0.109 257.8)
-
Step 500
500 (this color)
#4F89DB
oklch(62.9% 0.139 257.3)
-
Step 600
600
#3372C9
oklch(55.6% 0.15 257.3)
-
Step 700
700
#255FAE
oklch(49.1% 0.14 257.3)
-
Step 800
800
#204E8D
oklch(42.7% 0.116 257.2)
-
Step 900
900
#204171
oklch(37.7% 0.091 257.9)
-
Step 950
950
#132742
oklch(27.1% 0.057 256.4)
#4F89DB 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) | #658FDE | 0.030 |
| Deuteranopia (no green cones) | #5182D9 | 0.018 |
| Tritanopia (no blue cones) | #009CA7 | 0.114 |
| Achromatopsia (no color) | #888888 | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4F89DB
#4F89DB
oklch(62.9% 0.139 257.3)
- #B47D00
#B47D00
oklch(62.9% 0.131 77.8)
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 #4F89DB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.018
- Soft Blue #6488EA ΔE 0.033
- Chefchaouen Blue #4895EF ΔE 0.039
- Water Blue #0E87CC ΔE 0.047
- Cornflower Blue #6495ED ΔE 0.047
- Cool Blue #4984B8 ΔE 0.054
- Faded Blue #658CBB ΔE 0.055
- Dodger Blue #1E90FF ΔE 0.058
Use #4F89DB 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.