#5990DD
Closest named color: Dark Sky Blue (#448EE4). oklch(65% 0.13 257), rgb(89, 144, 221).
Aa
Black text reads best on this color (6.45:1).
About this color
#5990DD is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.130 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.023 away. Black text reads best on it, at 6.45:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.45:1 |
| White text | 3.25:1 |
Values
| HEX | #5990DD |
| RGB | rgb(89, 144, 221) |
| HSL | hsl(215, 66%, 61%) |
| OKLCH | oklch(65% 0.13 257) |
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 #5990DD | 3.25:1 | AA large text | Lc -65.0 | Content text, not long reading |
| Black text on #5990DD | 6.45:1 | AA | Lc 44.5 | Non-text elements, placeholder text |
| #5990DD text on white | 3.25:1 | AA large text | Lc 59.6 | Large or bold text, headings |
| #5990DD text on black | 6.45:1 | AA | Lc -42.1 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF6
oklch(93.7% 0.018 253.3)
-
Step 200
200
#CBDBF1
oklch(88.6% 0.035 256.3)
-
Step 300
300
#A7C3EA
oklch(81% 0.063 256.7)
-
Step 400
400
#77A3E0
oklch(70.8% 0.102 256.7)
-
Step 500
500 (this color)
#5990DD
oklch(65% 0.13 257)
-
Step 600
600
#3773C4
oklch(55.7% 0.141 256.8)
-
Step 700
700
#2A60A9
oklch(49.2% 0.13 256.9)
-
Step 800
800
#244E89
oklch(42.6% 0.109 257.4)
-
Step 900
900
#22426E
oklch(37.8% 0.085 256.8)
-
Step 950
950
#142740
oklch(27% 0.053 255.8)
#5990DD 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) | #7095E0 | 0.030 |
| Deuteranopia (no green cones) | #5E89DB | 0.018 |
| Tritanopia (no blue cones) | #00A1AC | 0.110 |
| Achromatopsia (no color) | #8F8F8F | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5990DD
#5990DD
oklch(65% 0.13 257)
- #BB8317
#BB8317
oklch(65% 0.13 77)
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 #5990DD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.023
- Chefchaouen Blue #4895EF ΔE 0.029
- Cornflower Blue #6495ED ΔE 0.029
- Soft Blue #6488EA ΔE 0.033
- Faded Blue #658CBB ΔE 0.051
- Dodger Blue #1E90FF ΔE 0.061
- Water Blue #0E87CC ΔE 0.062
- Cool Blue #4984B8 ΔE 0.064
Use #5990DD 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.